Search Class 10 Questions

100 results found for "multiple surds" in Class 10.

कौन-सी संख्या \(2^6\times3\times5\) और \(2^4\times3^3\times7\) दोनों की गुणज अवश्य होगी?

Which number will surely be a multiple of both \(2^6\times3\times5\) and \(2^4\times3^3\times7\)?

Explanation opens after your attempt
Correct Answer

A. \(2^6\times3^3\times5\times7\)

Step 1

Concept

A common multiple must contain all prime powers required by both numbers.

Step 2

Why this answer is correct

The highest powers are \(2^6\), \(3^3\), (5), and (7).

Step 3

Exam Tip

Do not miss any required prime factor while checking a multiple. चरण 1: दोनों की गुणज संख्या में दोनों संख्याओं के लिए जरूरी सभी अभाज्य घातें होनी चाहिए। चरण 2: बड़ी घातें \(2^6\), \(3^3\), (5) और (7) हैं। चरण 3: गुणज जाँचते समय कोई आवश्यक अभाज्य गुणनखंड न छोड़ें।

Open Question Page
Ask Friends

कौन-सी संख्या \(2^4\times3^2\) और \(2^2\times3^3\times5\) दोनों की गुणज अवश्य होगी?

Which number will surely be a multiple of both \(2^4\times3^2\) and \(2^2\times3^3\times5\)?

Explanation opens after your attempt
Correct Answer

A. \(2^4\times3^3\times5\)

Step 1

Concept

A common multiple must contain all required prime powers of both numbers.

Step 2

Why this answer is correct

The required highest powers are \(2^4\), \(3^3\), and (5).

Step 3

Exam Tip

Do not miss any required prime factor while checking a multiple. चरण 1: दोनों की गुणज संख्या में दोनों संख्याओं के लिए जरूरी सभी अभाज्य घातें होनी चाहिए। चरण 2: आवश्यक बड़ी घातें \(2^4\), \(3^3\) और (5) हैं। चरण 3: गुणज की जाँच में कोई आवश्यक अभाज्य छूटना नहीं चाहिए।

Open Question Page
Ask Friends

कौन-सी संख्या \(2^5\times3^2\times5\) और \(2^3\times3^4\times7\) दोनों की गुणज होगी?

Which number will be a multiple of both \(2^5\times3^2\times5\) and \(2^3\times3^4\times7\)?

Explanation opens after your attempt
Correct Answer

A. \(2^5\times3^4\times5\times7\)

Step 1

Concept

A common multiple must be a multiple of the LCM.

Step 2

Why this answer is correct

The LCM contains \(2^5\), \(3^4\), (5), and (7).

Step 3

Exam Tip

For a multiple, every required prime power must be present. चरण 1: दोनों की गुणज संख्या उनके लघुत्तम समापवर्त्य की भी गुणज होगी। चरण 2: लघुत्तम समापवर्त्य में \(2^5\), \(3^4\), (5) और (7) आएँगे। चरण 3: गुणज जाँचते समय हर आवश्यक अभाज्य घात मौजूद होनी चाहिए।

Open Question Page
Ask Friends

\(3^3 \times 7\) का सबसे छोटा सम गुणज कौन सा होगा?

What will be the smallest even multiple of \(3^3 \times 7\)?

Explanation opens after your attempt
Correct Answer

B. \(2 \times 3^3 \times 7\)

Step 1

Concept

The given number has no (2), so it is odd.

Step 2

Why this answer is correct

Multiplying by just one (2) gives the smallest even multiple.

Step 3

Exam Tip

When the smallest multiple is asked, do not increase exponents unnecessarily. चरण 1: दी गई संख्या में (2) नहीं है, इसलिए वह विषम है। चरण 2: सबसे छोटा सम गुणज बनाने के लिए केवल एक (2) गुणा करना पर्याप्त है। चरण 3: सबसे छोटा गुणज पूछे जाने पर अनावश्यक घात न बढ़ाएं।

Open Question Page
Ask Friends

\(3^2 \times 5 \times 7\) का सबसे छोटा सम गुणज कौन सा होगा?

What will be the smallest even multiple of \(3^2 \times 5 \times 7\)?

Explanation opens after your attempt
Correct Answer

B. \(2 \times 3^2 \times 5 \times 7\)

Step 1

Concept

The given number has no (2), so it is odd.

Step 2

Why this answer is correct

To make the smallest even multiple, multiplying by one (2) is enough.

Step 3

Exam Tip

When the smallest multiple is asked, do not increase exponents unnecessarily. चरण 1: दी गई संख्या में (2) नहीं है, इसलिए वह विषम है। चरण 2: सबसे छोटा सम गुणज बनाने के लिए केवल एक (2) गुणा करना पर्याप्त है। चरण 3: सबसे छोटा गुणज पूछे जाने पर अनावश्यक घात न बढ़ाएं।

Open Question Page
Ask Friends

यदि \(N=2^2 \times 3^5\), तो (N) का सबसे छोटा पूर्ण घन गुणज कौन सा है?

If \(N=2^2 \times 3^5\), what is the smallest perfect-cube multiple of (N)?

Explanation opens after your attempt
Correct Answer

A. \(2^3 \times 3^6\)

Step 1

Concept

In a perfect cube, exponents must be multiples of (3).

Step 2

Why this answer is correct

\(2^2\) must become \(2^3\), and \(3^5\) must become \(3^6\).

Step 3

Exam Tip

For the smallest cube multiple, move each exponent to the next multiple of (3). चरण 1: पूर्ण घन में घातें (3) की गुणज होनी चाहिए। चरण 2: \(2^2\) को \(2^3\) और \(3^5\) को \(3^6\) बनाना होगा। चरण 3: सबसे छोटा पूर्ण घन गुणज पाने के लिए अगली (3) की गुणज घात लें।

Open Question Page
Ask Friends

यदि \(N=2^3 \times 3^2 \times 5\), तो (N) का सबसे छोटा पूर्ण वर्ग गुणज कौन सा है?

If \(N=2^3 \times 3^2 \times 5\), what is the smallest perfect-square multiple of (N)?

Explanation opens after your attempt
Correct Answer

A. \(2^4 \times 3^2 \times 5^2\)

Step 1

Concept

In a perfect square, all exponents must be even.

Step 2

Why this answer is correct

Make \(2^3\) into \(2^4\) and (5) into \(5^2\); \(3^2\) is already fine.

Step 3

Exam Tip

For the smallest square multiple, increase only the necessary exponents. चरण 1: पूर्ण वर्ग में सभी घातें सम होनी चाहिए। चरण 2: \(2^3\) को \(2^4\) और (5) को \(5^2\) बनाना होगा; \(3^2\) पहले से सही है। चरण 3: सबसे छोटे पूर्ण वर्ग गुणज में केवल जरूरी घातें ही बढ़ाएं।

Open Question Page
Ask Friends

\(3^2 \times 5^2 \times 7\) का सबसे छोटा सम गुणज कौन सा है?

What is the smallest even multiple of \(3^2 \times 5^2 \times 7\)?

Explanation opens after your attempt
Correct Answer

A. \(2 \times 3^2 \times 5^2 \times 7\)

Step 1

Concept

The given number is odd because it has no factor (2).

Step 2

Why this answer is correct

To make the smallest even multiple, multiply by only one (2).

Step 3

Exam Tip

Do not increase exponents unnecessarily when the smallest value is asked. चरण 1: दी गई संख्या विषम है क्योंकि इसमें (2) नहीं है। चरण 2: सबसे छोटा सम गुणज बनाने के लिए केवल एक (2) गुणा करना पर्याप्त है। चरण 3: सबसे छोटी शर्त पूरी करने के लिए अनावश्यक घात न बढ़ाएं।

Open Question Page
Ask Friends

यदि \(63=7 \times 9+0\) है तो (63) किसका गुणज है?

If \(63=7 \times 9+0\), then (63) is a multiple of which number?

Explanation opens after your attempt
Correct Answer

A. (7)

Step 1

Concept

In \(63=7 \times 9+0\), the remainder is (0).

Step 2

Why this answer is correct

This means (63) is exactly divisible by (7).

Step 3

Exam Tip

In zero-remainder questions, identify the multiple directly. चरण 1: \(63=7 \times 9+0\) में शेषफल (0) है। चरण 2: इसका अर्थ है (63), (7) से पूर्णतः विभाजित होता है। चरण 3: शून्य शेषफल वाले प्रश्नों में गुणज पहचानना आसान होता है।

Open Question Page
Ask Friends

बहुखंडन में एक कोशिका से कई संतति कोशिकाएं बनना किस मुख्य घटना पर निर्भर करता है?

Formation of many daughter cells from one cell in multiple fission depends mainly on which event?

Explanation opens after your attempt
Correct Answer

B. केंद्रक के बार बार विभाजन और बाद में कोशिका द्रव्य के विभाजन परRepeated nuclear division followed by cytoplasmic division

Step 1

Concept

In multiple fission genetic material can divide many times first.

Step 2

Why this answer is correct

Cytoplasm later divides around these parts.

Step 3

Exam Tip

This forms many daughter cells. चरण 1: बहुखंडन में पहले आनुवंशिक पदार्थ कई भागों में बंट सकता है। चरण 2: बाद में कोशिका द्रव्य उन भागों के चारों ओर बंटता है। चरण 3: इससे कई संतति कोशिकाएं बनती हैं।

Open Question Page
Ask Friends

बहुखंडन में एक कोशिका से अनेक संतति बनना किस स्थिति में अधिक उपयोगी हो सकता है?

In which situation can production of many offspring from one cell by multiple fission be more useful?

Explanation opens after your attempt
Correct Answer

A. जब प्रतिकूल दशा के बाद अनुकूल दशा अचानक मिल जाएWhen favorable conditions suddenly return after unfavorable conditions

Step 1

Concept

Some microorganisms can form a protected stage in difficult conditions.

Step 2

Why this answer is correct

Repeated divisions can occur inside it.

Step 3

Exam Tip

When conditions become favorable, many offspring can emerge together. चरण 1: कुछ सूक्ष्म जीव कठिन दशा में सुरक्षित अवस्था बना सकते हैं। चरण 2: उसके भीतर बार बार विभाजन हो सकता है। चरण 3: अनुकूल दशा मिलने पर कई संतति एक साथ निकल सकती हैं।

Open Question Page
Ask Friends

बहुखंडन में सुरक्षा आवरण का महत्व क्या है?

What is the importance of a protective covering in multiple fission?

Explanation opens after your attempt
Correct Answer

A. यह प्रतिकूल दशा में कोशिका की रक्षा कर सकता हैIt can protect the cell in unfavorable conditions

Step 1

Concept

Some microorganisms form a protective covering in difficult conditions.

Step 2

Why this answer is correct

The nucleus may divide many times inside it.

Step 3

Exam Tip

When conditions become favorable, many offspring may come out. चरण 1: कुछ सूक्ष्म जीव कठिन दशा में सुरक्षा आवरण बना लेते हैं। चरण 2: आवरण के भीतर केंद्रक कई बार विभाजित हो सकता है। चरण 3: अनुकूल दशा आने पर कई संततियाँ बाहर निकल सकती हैं।

Open Question Page
Ask Friends

बहुखंडन कठिन दशाओं में कुछ एककोशिकीय जीवों के लिए कैसे लाभकारी हो सकता है?

How can multiple fission be useful for some unicellular organisms in difficult conditions?

Explanation opens after your attempt
Correct Answer

A. सुरक्षित अवस्था में कई संतति कोशिकाएं बन सकती हैंMany daughter cells can form in a protected state

Step 1

Concept

Some unicellular organisms can form a covering in unfavourable conditions.

Step 2

Why this answer is correct

Repeated division inside forms many cells.

Step 3

Exam Tip

They can come out when conditions become favourable. चरण 1: कुछ एककोशिकीय जीव प्रतिकूल दशा में अपने चारों ओर आवरण बना सकते हैं। चरण 2: अंदर बार बार विभाजन होकर कई कोशिकाएं बनती हैं। चरण 3: अनुकूल दशा आने पर वे बाहर निकल सकती हैं।

Open Question Page
Ask Friends

द्विखंडन और बहुखंडन का सही भेद किस आधार पर किया जाता है?

On what basis is binary fission correctly distinguished from multiple fission?

Explanation opens after your attempt
Correct Answer

A. संतान कोशिकाओं की संख्या के आधार परOn the basis of number of daughter cells

Step 1

Concept

In binary fission one cell usually divides into two parts.

Step 2

Why this answer is correct

In multiple fission one cell can form many daughter cells.

Step 3

Exam Tip

Therefore the main difference is the number produced. चरण 1: द्विखंडन में एक कोशिका सामान्य रूप से दो भागों में बंटती है। चरण 2: बहुखंडन में एक कोशिका से अनेक संतति कोशिकाएं बन सकती हैं। चरण 3: इसलिए दोनों में संख्या का अंतर मुख्य है।

Open Question Page
Ask Friends

द्विखंडन और बहुखंडन में मुख्य अंतर क्या है?

What is the main difference between binary fission and multiple fission?

Explanation opens after your attempt
Correct Answer

A. द्विखंडन में दो संतति बनती हैं और बहुखंडन में अनेक संतति बनती हैंBinary fission forms two offspring and multiple fission forms many offspring

Step 1

Concept

In binary fission one cell divides into two.

Step 2

Why this answer is correct

In multiple fission one cell can form many new cells.

Step 3

Exam Tip

So the main difference is the number of offspring formed. चरण 1: द्विखंडन में एक कोशिका दो भागों में बँटती है। चरण 2: बहुखंडन में एक कोशिका से कई नई कोशिकाएँ बन सकती हैं। चरण 3: इसलिए दोनों में संतति की संख्या का अंतर मुख्य है।

Open Question Page
Ask Friends

द्विखंडन और बहुखंडन में मुख्य अंतर क्या है?

What is the main difference between binary fission and multiple fission?

Explanation opens after your attempt
Correct Answer

A. द्विखंडन में दो और बहुखंडन में अनेक संतति कोशिकाएं बनती हैंBinary fission forms two and multiple fission forms many daughter cells

Step 1

Concept

Binary fission means division into two parts.

Step 2

Why this answer is correct

Multiple fission can form many daughter cells from one cell.

Step 3

Exam Tip

Remember the difference by number of offspring cells. चरण 1: द्विखंडन का अर्थ दो भागों में विभाजन है। चरण 2: बहुखंडन में एक कोशिका से कई संतति कोशिकाएं बन सकती हैं। चरण 3: इसलिए संख्या के आधार पर अंतर याद रखें।

Open Question Page
Ask Friends

द्विखंडन और बहुखंडन में मुख्य अंतर क्या है?

What is the main difference between binary fission and multiple fission?

Explanation opens after your attempt
Correct Answer

A. द्विखंडन में दो संतानें और बहुखंडन में अनेक संतानें बन सकती हैंBinary fission forms two offspring while multiple fission can form many offspring

Step 1

Concept

In binary fission one cell divides into two.

Step 2

Why this answer is correct

In multiple fission one cell can produce many daughter cells.

Step 3

Exam Tip

Remember the difference by the number of offspring formed. चरण 1: द्विखंडन में एक कोशिका दो भागों में बंटती है। चरण 2: बहुखंडन में एक कोशिका से कई संतति कोशिकाएं बन सकती हैं। चरण 3: इसलिए संख्या के आधार पर दोनों में अंतर याद रखें।

Open Question Page
Ask Friends

यदि \(a=\sqrt{2}+\sqrt{3}+\sqrt{5}\), तो \(a^2\) में कौन-सा अपरिमेय पद अवश्य आएगा?

If \(a=\sqrt{2}+\sqrt{3}+\sqrt{5}\), which irrational term must appear in \(a^2\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{6}+2\sqrt{10}+2\sqrt{15}\)

Step 1

Concept

In the square of three terms, pairwise products appear along with individual squares.

Step 2

Why this answer is correct

Thus \(a^2=10+2\sqrt{6}+2\sqrt{10}+2\sqrt{15}\).

Step 3

Exam Tip

While squaring a sum of many surds, write all pairwise products. चरण 1: तीन पदों के वर्ग में अलग-अलग वर्गों के साथ दो-दो पदों के गुणन भी आते हैं। चरण 2: इसलिए \(a^2=10+2\sqrt{6}+2\sqrt{10}+2\sqrt{15}\) होगा। चरण 3: कई मूलों के योग का वर्ग करते समय सभी जोड़ीदार गुणन लिखें।

Open Question Page
Ask Friends

कौन-सा विकल्प \(\sqrt{50}+\sqrt{72}-\sqrt{98}\) का सही सरल रूप है?

Which option is the correct simplified form of \(\sqrt{50}+\sqrt{72}-\sqrt{98}\)?

Explanation opens after your attempt
Correct Answer

A. \(4\sqrt{2}\)

Step 1

Concept

\(\sqrt{50}=5\sqrt{2}\), \(\sqrt{72}=6\sqrt{2}\), and \(\sqrt{98}=7\sqrt{2}\).

Step 2

Why this answer is correct

\(5\sqrt{2}+6\sqrt{2}-7\sqrt{2}=4\sqrt{2}\).

Step 3

Exam Tip

Once all terms are like surds, add or subtract only the coefficients. चरण 1: \(\sqrt{50}=5\sqrt{2}\), \(\sqrt{72}=6\sqrt{2}\), और \(\sqrt{98}=7\sqrt{2}\)। चरण 2: \(5\sqrt{2}+6\sqrt{2}-7\sqrt{2}=4\sqrt{2}\)। चरण 3: सभी पद समान मूल में बदल जाएँ तो केवल गुणांक जोड़ें या घटाएँ।

Open Question Page
Ask Friends

कौन-सा विकल्प \(\sqrt{3}+\sqrt{12}+\sqrt{27}\) का सही सरल रूप है?

Which option is the correct simplified form of \(\sqrt{3}+\sqrt{12}+\sqrt{27}\)?

Explanation opens after your attempt
Correct Answer

A. \(6\sqrt{3}\)

Step 1

Concept

\(\sqrt{12}=2\sqrt{3}\) and \(\sqrt{27}=3\sqrt{3}\).

Step 2

Why this answer is correct

The total sum is \(\sqrt{3}+2\sqrt{3}+3\sqrt{3}=6\sqrt{3}\).

Step 3

Exam Tip

Converting all terms into like surds makes addition easy. चरण 1: \(\sqrt{12}=2\sqrt{3}\) और \(\sqrt{27}=3\sqrt{3}\)। चरण 2: कुल योग \(\sqrt{3}+2\sqrt{3}+3\sqrt{3}=6\sqrt{3}\) है। चरण 3: सभी पदों को समान मूल में बदलने से जोड़ आसान हो जाता है।

Open Question Page
Ask Friends

परिप्रेक्ष्य में एक से अधिक असंगत लुप्त बिंदु क्यों समस्या बन सकते हैं?

Why can multiple inconsistent vanishing points become a problem in perspective?

Explanation opens after your attempt
Correct Answer

A. वे स्थानिक तर्क को तोड़ते हैंThey break spatial logic

Step 1

Concept

Inconsistent vanishing points confuse depth. Exam tip: check perspective consistency.

Step 2

Why this answer is correct

The correct answer is A. वे स्थानिक तर्क को तोड़ते हैं / They break spatial logic. Inconsistent vanishing points confuse depth. Exam tip: check perspective consistency.

Step 3

Exam Tip

असंगत लुप्त बिंदु गहराई को भ्रमित करते हैं। परीक्षा में perspective consistency जांचें।

Open Question Page
Ask Friends

मामल्लपुरम के अर्जुन तपस्या पैनल की बहुव्याख्या से इतिहासकार क्या सीखते हैं?

What do historians learn from multiple interpretations of the Arjuna's Penance panel at Mamallapuram?

Explanation opens after your attempt
Correct Answer

A. कला प्रतीकों की व्याख्या में संदर्भ जरूरी हैContext is necessary in interpreting artistic symbols

Step 1

Concept

This panel is read as Arjuna's Penance or Descent of Ganga. For exams, understand multiple interpretations of art titles.

Step 2

Why this answer is correct

The correct answer is A. कला प्रतीकों की व्याख्या में संदर्भ जरूरी है / Context is necessary in interpreting artistic symbols. This panel is read as Arjuna's Penance or Descent of Ganga. For exams, understand multiple interpretations of art titles.

Step 3

Exam Tip

इस पैनल को अर्जुन तपस्या या गंगा अवतरण दोनों रूप में पढ़ा जाता है। परीक्षा में कला शीर्षकों की बहुव्याख्या समझें।

Open Question Page
Ask Friends

यदि एक संख्या दूसरी संख्या की गुणज हो, तो दोनों का महत्तम समापवर्तक क्या होता है?

If one number is a multiple of the other, what is the HCF of the two numbers?

Explanation opens after your attempt
Correct Answer

A. छोटी संख्याThe smaller number

Step 1

Concept

When one number is a multiple of the other, the smaller number divides both numbers exactly.

Step 2

Why this answer is correct

Therefore, the HCF is the smaller number.

Step 3

Exam Tip

This rule helps solve multiple-based questions quickly. चरण 1: जब एक संख्या दूसरी की गुणज होती है, तो छोटी संख्या दोनों को पूरा भाग देती है। चरण 2: इसलिए महत्तम समापवर्तक छोटी संख्या होती है। चरण 3: गुणज वाले प्रश्नों में यह छोटा नियम तेजी से उत्तर दिलाता है।

Open Question Page
Ask Friends

यदि एक संख्या दूसरी संख्या की गुणज हो, तो दोनों का लघुत्तम समापवर्त्य क्या होता है?

If one number is a multiple of the other, what is the LCM of the two numbers?

Explanation opens after your attempt
Correct Answer

B. बड़ी संख्याThe larger number

Step 1

Concept

When the larger number is a multiple of the smaller number, it is divisible by both numbers.

Step 2

Why this answer is correct

So the LCM is the larger number itself.

Step 3

Exam Tip

In such questions, first check whether one number is a multiple of the other. चरण 1: जब बड़ी संख्या छोटी संख्या की गुणज होती है, तो बड़ी संख्या दोनों से विभाजित हो जाती है। चरण 2: इसलिए लघुत्तम समापवर्त्य वही बड़ी संख्या होती है। चरण 3: ऐसे प्रश्न में पहले जांचें कि एक संख्या दूसरी की गुणज है या नहीं।

Open Question Page
Ask Friends

यदि \(\frac{1}{\sqrt{m}+\sqrt{n}}=\sqrt{m}-\sqrt{n}\) और (m>n>0), तो (m-n) का मान क्या है?

If \(\frac{1}{\sqrt{m}+\sqrt{n}}=\sqrt{m}-\sqrt{n}\) and (m>n>0), what is the value of (m-n)?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

Multiplying both sides by \(\sqrt{m}+\sqrt{n}\) gives (1=m-n). In exams, apply the conjugate product directly.

Step 2

Why this answer is correct

The correct answer is A. (1). Multiplying both sides by \(\sqrt{m}+\sqrt{n}\) gives (1=m-n). In exams, apply the conjugate product directly.

Step 3

Exam Tip

दोनों पक्षों को \(\sqrt{m}+\sqrt{n}\) से गुणा करने पर (1=m-n) मिलता है। परीक्षा में संयुग्म गुणनफल सीधे लगाएं।

Open Question Page
Ask Friends

यदि \(s=4+\sqrt{17}\), तो \(s^{2}-\frac{1}{s^{2}}\) का मान क्या है?

If \(s=4+\sqrt{17}\), what is the value of \(s^{2}-\frac{1}{s^{2}}\)?

Explanation opens after your attempt
Correct Answer

A. \(16\sqrt{17}\)

Step 1

Concept

Here \(\frac{1}{s}=\sqrt{17}-4\), so \(s-\frac{1}{s}=8\) and \(s+\frac{1}{s}=2\sqrt{17}\). Thus \(s^{2}-\frac{1}{s^{2}}=16\sqrt{17}\).

Step 2

Why this answer is correct

The correct answer is A. \(16\sqrt{17}\). Here \(\frac{1}{s}=\sqrt{17}-4\), so \(s-\frac{1}{s}=8\) and \(s+\frac{1}{s}=2\sqrt{17}\). Thus \(s^{2}-\frac{1}{s^{2}}=16\sqrt{17}\).

Step 3

Exam Tip

\(\frac{1}{s}=\sqrt{17}-4\), इसलिए \(s-\frac{1}{s}=8\) और \(s+\frac{1}{s}=2\sqrt{17}\)। अतः \(s^{2}-\frac{1}{s^{2}}=16\sqrt{17}\)।

Open Question Page
Ask Friends

यदि \(x=\sqrt{11}-\sqrt{6}\), तो \(x^{2}+2\sqrt{66}\) का मान क्या है?

If \(x=\sqrt{11}-\sqrt{6}\), what is the value of \(x^{2}+2\sqrt{66}\)?

Explanation opens after your attempt
Correct Answer

C. (17)

Step 1

Concept

Since \(x^{2}=11+6-2\sqrt{66}=17-2\sqrt{66}\), \(x^{2}+2\sqrt{66}=17\).

Step 2

Why this answer is correct

The correct answer is C. (17). Since \(x^{2}=11+6-2\sqrt{66}=17-2\sqrt{66}\), \(x^{2}+2\sqrt{66}=17\).

Step 3

Exam Tip

\(x^{2}=11+6-2\sqrt{66}=17-2\sqrt{66}\)। इसलिए \(x^{2}+2\sqrt{66}=17\)।

Open Question Page
Ask Friends

यदि \(y=7+4\sqrt{3}\), तो \(y+\frac{1}{y}\) का मान क्या है?

If \(y=7+4\sqrt{3}\), what is the value of \(y+\frac{1}{y}\)?

Explanation opens after your attempt
Correct Answer

A. (14)

Step 1

Concept

We have \(\frac{1}{7+4\sqrt{3}}=7-4\sqrt{3}\), because (49-48=1). The sum is (14).

Step 2

Why this answer is correct

The correct answer is A. (14). We have \(\frac{1}{7+4\sqrt{3}}=7-4\sqrt{3}\), because (49-48=1). The sum is (14).

Step 3

Exam Tip

\(\frac{1}{7+4\sqrt{3}}=7-4\sqrt{3}\), क्योंकि (49-48=1) है। योग (14) मिलता है।

Open Question Page
Ask Friends

किस विकल्प में (\(4\sqrt{3}-3\sqrt{5}\)^{2}) का सही विस्तार है?

Which option gives the correct expansion of (\(4\sqrt{3}-3\sqrt{5}\)^{2})?

Explanation opens after your attempt
Correct Answer

A. \(93-24\sqrt{15}\)

Step 1

Concept

Here (\(4\sqrt{3}\)^{2}=48), (\(3\sqrt{5}\)^{2}=45), and the middle term is \(24\sqrt{15}\). Therefore, the expansion is \(93-24\sqrt{15}\).

Step 2

Why this answer is correct

The correct answer is A. \(93-24\sqrt{15}\). Here (\(4\sqrt{3}\)^{2}=48), (\(3\sqrt{5}\)^{2}=45), and the middle term is \(24\sqrt{15}\). Therefore, the expansion is \(93-24\sqrt{15}\).

Step 3

Exam Tip

(\(4\sqrt{3}\)^{2}=48), (\(3\sqrt{5}\)^{2}=45), और मध्य पद \(24\sqrt{15}\) है। इसलिए विस्तार \(93-24\sqrt{15}\) है।

Open Question Page
Ask Friends

\(\frac{1}{\sqrt{26}-5}+\frac{1}{\sqrt{26}+5}\) का मान क्या है?

What is the value of \(\frac{1}{\sqrt{26}-5}+\frac{1}{\sqrt{26}+5}\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{26}\)

Step 1

Concept

The product of denominators is (26-25=1), and the numerator is (\(\sqrt{26}+5\)+\(\sqrt{26}-5\)=2\sqrt{26}). In exams, add conjugate fractions together.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{26}\). The product of denominators is (26-25=1), and the numerator is (\(\sqrt{26}+5\)+\(\sqrt{26}-5\)=2\sqrt{26}). In exams, add conjugate fractions together.

Step 3

Exam Tip

हरों का गुणनफल (26-25=1) है और अंश (\(\sqrt{26}+5\)+\(\sqrt{26}-5\)=2\sqrt{26}) है। परीक्षा में संयुग्म भिन्नों को साथ जोड़ें।

Open Question Page
Ask Friends

यदि \(r=\sqrt{21}+\sqrt{14}\), तो \(r^{2}-14\sqrt{6}\) का मान क्या है?

If \(r=\sqrt{21}+\sqrt{14}\), what is the value of \(r^{2}-14\sqrt{6}\)?

Explanation opens after your attempt
Correct Answer

C. (35)

Step 1

Concept

Since \(r^{2}=21+14+2\sqrt{294}=35+14\sqrt{6}\), \(r^{2}-14\sqrt{6}=35\).

Step 2

Why this answer is correct

The correct answer is C. (35). Since \(r^{2}=21+14+2\sqrt{294}=35+14\sqrt{6}\), \(r^{2}-14\sqrt{6}=35\).

Step 3

Exam Tip

\(r^{2}=21+14+2\sqrt{294}=35+14\sqrt{6}\)। इसलिए \(r^{2}-14\sqrt{6}=35\)।

Open Question Page
Ask Friends

यदि \(A=19+6\sqrt{10}\), तो \(\sqrt{A}\) का सरल रूप क्या है?

If \(A=19+6\sqrt{10}\), what is the simplified form of \(\sqrt{A}\)?

Explanation opens after your attempt
Correct Answer

A. \(3+\sqrt{10}\)

Step 1

Concept

Because (\(3+\sqrt{10}\)^{2}=9+10+6\sqrt{10}=19+6\sqrt{10}), \(\sqrt{A}=3+\sqrt{10}\). In exams, identify perfect-square surd forms.

Step 2

Why this answer is correct

The correct answer is A. \(3+\sqrt{10}\). Because (\(3+\sqrt{10}\)^{2}=9+10+6\sqrt{10}=19+6\sqrt{10}), \(\sqrt{A}=3+\sqrt{10}\). In exams, identify perfect-square surd forms.

Step 3

Exam Tip

क्योंकि (\(3+\sqrt{10}\)^{2}=9+10+6\sqrt{10}=19+6\sqrt{10}), इसलिए \(\sqrt{A}=3+\sqrt{10}\)। परीक्षा में पूर्ण वर्ग करणी पहचानें।

Open Question Page
Ask Friends

\(\sqrt{242}-\sqrt{128}+\sqrt{98}-\sqrt{72}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{242}-\sqrt{128}+\sqrt{98}-\sqrt{72}\)?

Explanation opens after your attempt
Correct Answer

C. \(4\sqrt{2}\)

Step 1

Concept

We have \(\sqrt{242}=11\sqrt{2}\), \(\sqrt{128}=8\sqrt{2}\), \(\sqrt{98}=7\sqrt{2}\), and \(\sqrt{72}=6\sqrt{2}\). The total is \(4\sqrt{2}\).

Step 2

Why this answer is correct

The correct answer is C. \(4\sqrt{2}\). We have \(\sqrt{242}=11\sqrt{2}\), \(\sqrt{128}=8\sqrt{2}\), \(\sqrt{98}=7\sqrt{2}\), and \(\sqrt{72}=6\sqrt{2}\). The total is \(4\sqrt{2}\).

Step 3

Exam Tip

\(\sqrt{242}=11\sqrt{2}\), \(\sqrt{128}=8\sqrt{2}\), \(\sqrt{98}=7\sqrt{2}\), और \(\sqrt{72}=6\sqrt{2}\)। कुल \(4\sqrt{2}\) मिलता है।

Open Question Page
Ask Friends

यदि \(u=\sqrt{17}+\sqrt{8}\) और \(v=\sqrt{17}-\sqrt{8}\), तो \(\frac{u^{2}-v^{2}}{uv}\) का मान क्या है?

If \(u=\sqrt{17}+\sqrt{8}\) and \(v=\sqrt{17}-\sqrt{8}\), what is the value of \(\frac{u^{2}-v^{2}}{uv}\)?

Explanation opens after your attempt
Correct Answer

C. \(\frac{8\sqrt{34}}{9}\)

Step 1

Concept

Here (u^{2}-v^{2}=(u-v)(u+v)=2\sqrt{8}\cdot2\sqrt{17}=8\sqrt{34}), and (uv=9). Hence the value is \(\frac{8\sqrt{34}}{9}\).

Step 2

Why this answer is correct

The correct answer is C. \(\frac{8\sqrt{34}}{9}\). Here (u^{2}-v^{2}=(u-v)(u+v)=2\sqrt{8}\cdot2\sqrt{17}=8\sqrt{34}), and (uv=9). Hence the value is \(\frac{8\sqrt{34}}{9}\).

Step 3

Exam Tip

(u^{2}-v^{2}=(u-v)(u+v)=2\sqrt{8}\cdot2\sqrt{17}=8\sqrt{34}) और (uv=9) है। इसलिए मान \(\frac{8\sqrt{34}}{9}\) है।

Open Question Page
Ask Friends

यदि \(x=\sqrt{2}+\sqrt{5}\), तो \(x^{3}-7x\) का मान क्या है?

If \(x=\sqrt{2}+\sqrt{5}\), what is the value of \(x^{3}-7x\)?

Explanation opens after your attempt
Correct Answer

A. \(10\sqrt{2}+4\sqrt{5}\)

Step 1

Concept

Here \(x^{2}=7+2\sqrt{10}\), so \(x^{3}=17\sqrt{2}+11\sqrt{5}\) and \(x^{3}-7x=10\sqrt{2}+4\sqrt{5}\). In exams, first find \(x^{2}\) and then multiply by (x).

Step 2

Why this answer is correct

The correct answer is A. \(10\sqrt{2}+4\sqrt{5}\). Here \(x^{2}=7+2\sqrt{10}\), so \(x^{3}=17\sqrt{2}+11\sqrt{5}\) and \(x^{3}-7x=10\sqrt{2}+4\sqrt{5}\). In exams, first find \(x^{2}\) and then multiply by (x).

Step 3

Exam Tip

\(x^{2}=7+2\sqrt{10}\), इसलिए \(x^{3}=17\sqrt{2}+11\sqrt{5}\) और \(x^{3}-7x=10\sqrt{2}+4\sqrt{5}\)। परीक्षा में पहले \(x^{2}\) निकालकर फिर (x) से गुणा करें।

Open Question Page
Ask Friends

यदि \(s=3+\sqrt{10}\), तो \(s^{2}-\frac{1}{s^{2}}\) का मान क्या है?

If \(s=3+\sqrt{10}\), what is the value of \(s^{2}-\frac{1}{s^{2}}\)?

Explanation opens after your attempt
Correct Answer

A. \(12\sqrt{10}\)

Step 1

Concept

Here \(\frac{1}{s}=\sqrt{10}-3\), so \(s-\frac{1}{s}=6\) and \(s+\frac{1}{s}=2\sqrt{10}\). Thus \(s^{2}-\frac{1}{s^{2}}=12\sqrt{10}\).

Step 2

Why this answer is correct

The correct answer is A. \(12\sqrt{10}\). Here \(\frac{1}{s}=\sqrt{10}-3\), so \(s-\frac{1}{s}=6\) and \(s+\frac{1}{s}=2\sqrt{10}\). Thus \(s^{2}-\frac{1}{s^{2}}=12\sqrt{10}\).

Step 3

Exam Tip

\(\frac{1}{s}=\sqrt{10}-3\), इसलिए \(s-\frac{1}{s}=6\) और \(s+\frac{1}{s}=2\sqrt{10}\)। अतः \(s^{2}-\frac{1}{s^{2}}=12\sqrt{10}\)।

Open Question Page
Ask Friends

यदि \(x=\sqrt{7}-\sqrt{3}\), तो \(x^{2}+2\sqrt{21}\) का मान क्या है?

If \(x=\sqrt{7}-\sqrt{3}\), what is the value of \(x^{2}+2\sqrt{21}\)?

Explanation opens after your attempt
Correct Answer

C. (10)

Step 1

Concept

Since \(x^{2}=7+3-2\sqrt{21}=10-2\sqrt{21}\), \(x^{2}+2\sqrt{21}=10\).

Step 2

Why this answer is correct

The correct answer is C. (10). Since \(x^{2}=7+3-2\sqrt{21}=10-2\sqrt{21}\), \(x^{2}+2\sqrt{21}=10\).

Step 3

Exam Tip

\(x^{2}=7+3-2\sqrt{21}=10-2\sqrt{21}\)। इसलिए \(x^{2}+2\sqrt{21}=10\)।

Open Question Page
Ask Friends

यदि \(y=5+2\sqrt{6}\), तो \(y+\frac{1}{y}\) का मान क्या है?

If \(y=5+2\sqrt{6}\), what is the value of \(y+\frac{1}{y}\)?

Explanation opens after your attempt
Correct Answer

B. (10)

Step 1

Concept

We have \(\frac{1}{5+2\sqrt{6}}=5-2\sqrt{6}\), because the product is (25-24=1). The sum is (10).

Step 2

Why this answer is correct

The correct answer is B. (10). We have \(\frac{1}{5+2\sqrt{6}}=5-2\sqrt{6}\), because the product is (25-24=1). The sum is (10).

Step 3

Exam Tip

\(\frac{1}{5+2\sqrt{6}}=5-2\sqrt{6}\), क्योंकि गुणनफल (25-24=1) है। योग (10) मिलता है।

Open Question Page
Ask Friends

किस विकल्प में (\(3\sqrt{5}-2\sqrt{7}\)^{2}) का सही विस्तार है?

Which option gives the correct expansion of (\(3\sqrt{5}-2\sqrt{7}\)^{2})?

Explanation opens after your attempt
Correct Answer

A. \(73-12\sqrt{35}\)

Step 1

Concept

Here (\(3\sqrt{5}\)^{2}=45), (\(2\sqrt{7}\)^{2}=28), and the middle term is \(12\sqrt{35}\). Therefore, the expansion is \(73-12\sqrt{35}\).

Step 2

Why this answer is correct

The correct answer is A. \(73-12\sqrt{35}\). Here (\(3\sqrt{5}\)^{2}=45), (\(2\sqrt{7}\)^{2}=28), and the middle term is \(12\sqrt{35}\). Therefore, the expansion is \(73-12\sqrt{35}\).

Step 3

Exam Tip

(\(3\sqrt{5}\)^{2}=45), (\(2\sqrt{7}\)^{2}=28), और मध्य पद \(12\sqrt{35}\) है। इसलिए विस्तार \(73-12\sqrt{35}\) है।

Open Question Page
Ask Friends

\(\frac{1}{\sqrt{10}-3}-\frac{1}{\sqrt{10}+3}\) का मान क्या है?

What is the value of \(\frac{1}{\sqrt{10}-3}-\frac{1}{\sqrt{10}+3}\)?

Explanation opens after your attempt
Correct Answer

A. (6)

Step 1

Concept

The product of denominators is (10-9=1), and the numerator is (\(\sqrt{10}+3\)-\(\sqrt{10}-3\)=6). In exams, find the product of conjugate denominators first.

Step 2

Why this answer is correct

The correct answer is A. (6). The product of denominators is (10-9=1), and the numerator is (\(\sqrt{10}+3\)-\(\sqrt{10}-3\)=6). In exams, find the product of conjugate denominators first.

Step 3

Exam Tip

हरों का गुणनफल (10-9=1) है और अंश (\(\sqrt{10}+3\)-\(\sqrt{10}-3\)=6) है। परीक्षा में संयुग्म हरों का गुणनफल पहले निकालें।

Open Question Page
Ask Friends

यदि \(r=\sqrt{15}+\sqrt{6}\), तो \(r^{2}-6\sqrt{10}\) का मान क्या है?

If \(r=\sqrt{15}+\sqrt{6}\), what is the value of \(r^{2}-6\sqrt{10}\)?

Explanation opens after your attempt
Correct Answer

C. (21)

Step 1

Concept

Since \(r^{2}=15+6+2\sqrt{90}=21+6\sqrt{10}\), \(r^{2}-6\sqrt{10}=21\).

Step 2

Why this answer is correct

The correct answer is C. (21). Since \(r^{2}=15+6+2\sqrt{90}=21+6\sqrt{10}\), \(r^{2}-6\sqrt{10}=21\).

Step 3

Exam Tip

\(r^{2}=15+6+2\sqrt{90}=21+6\sqrt{10}\)। इसलिए \(r^{2}-6\sqrt{10}=21\)।

Open Question Page
Ask Friends

यदि \(A=14+6\sqrt{5}\), तो \(\sqrt{A}\) का सरल रूप क्या है?

If \(A=14+6\sqrt{5}\), what is the simplified form of \(\sqrt{A}\)?

Explanation opens after your attempt
Correct Answer

A. \(3+\sqrt{5}\)

Step 1

Concept

Because (\(3+\sqrt{5}\)^{2}=9+5+6\sqrt{5}=14+6\sqrt{5}), \(\sqrt{A}=3+\sqrt{5}\). In exams, identify perfect-square surd forms.

Step 2

Why this answer is correct

The correct answer is A. \(3+\sqrt{5}\). Because (\(3+\sqrt{5}\)^{2}=9+5+6\sqrt{5}=14+6\sqrt{5}), \(\sqrt{A}=3+\sqrt{5}\). In exams, identify perfect-square surd forms.

Step 3

Exam Tip

क्योंकि (\(3+\sqrt{5}\)^{2}=9+5+6\sqrt{5}=14+6\sqrt{5}), इसलिए \(\sqrt{A}=3+\sqrt{5}\)। परीक्षा में पूर्ण वर्ग करणी पहचानें।

Open Question Page
Ask Friends

\(\sqrt{162}-\sqrt{98}+\sqrt{50}-\sqrt{18}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{162}-\sqrt{98}+\sqrt{50}-\sqrt{18}\)?

Explanation opens after your attempt
Correct Answer

C. \(4\sqrt{2}\)

Step 1

Concept

We have \(\sqrt{162}=9\sqrt{2}\), \(\sqrt{98}=7\sqrt{2}\), \(\sqrt{50}=5\sqrt{2}\), and \(\sqrt{18}=3\sqrt{2}\). The total is \(4\sqrt{2}\).

Step 2

Why this answer is correct

The correct answer is C. \(4\sqrt{2}\). We have \(\sqrt{162}=9\sqrt{2}\), \(\sqrt{98}=7\sqrt{2}\), \(\sqrt{50}=5\sqrt{2}\), and \(\sqrt{18}=3\sqrt{2}\). The total is \(4\sqrt{2}\).

Step 3

Exam Tip

\(\sqrt{162}=9\sqrt{2}\), \(\sqrt{98}=7\sqrt{2}\), \(\sqrt{50}=5\sqrt{2}\), और \(\sqrt{18}=3\sqrt{2}\)। कुल \(4\sqrt{2}\) मिलता है।

Open Question Page
Ask Friends

यदि \(u=\sqrt{13}+\sqrt{5}\) और \(v=\sqrt{13}-\sqrt{5}\), तो \(\frac{u^{2}-v^{2}}{uv}\) का मान क्या है?

If \(u=\sqrt{13}+\sqrt{5}\) and \(v=\sqrt{13}-\sqrt{5}\), what is the value of \(\frac{u^{2}-v^{2}}{uv}\)?

Explanation opens after your attempt
Correct Answer

B. \(2\sqrt{65}\)

Step 1

Concept

Here (u^{2}-v^{2}=(u-v)(u+v)=2\sqrt{5}\cdot2\sqrt{13}=4\sqrt{65}) and (uv=8). Hence the value is \(\frac{\sqrt{65}}{2}\).

Step 2

Why this answer is correct

The correct answer is B. \(2\sqrt{65}\). Here (u^{2}-v^{2}=(u-v)(u+v)=2\sqrt{5}\cdot2\sqrt{13}=4\sqrt{65}) and (uv=8). Hence the value is \(\frac{\sqrt{65}}{2}\).

Step 3

Exam Tip

(u^{2}-v^{2}=(u-v)(u+v)=2\sqrt{5}\cdot2\sqrt{13}=4\sqrt{65}) और (uv=8)। इसलिए मान \(\frac{\sqrt{65}}{2}\) है।

Open Question Page
Ask Friends

यदि \(\frac{1}{\sqrt{a}+\sqrt{b}}=\sqrt{a}-\sqrt{b}\) और (a>b>0), तो (a-b) का मान क्या है?

If \(\frac{1}{\sqrt{a}+\sqrt{b}}=\sqrt{a}-\sqrt{b}\) and (a>b>0), what is the value of (a-b)?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

Multiplying both sides by \(\sqrt{a}+\sqrt{b}\), we get (1=\(\sqrt{a}-\sqrt{b}\)\(\sqrt{a}+\sqrt{b}\)=a-b). In exams, apply the conjugate product directly.

Step 2

Why this answer is correct

The correct answer is A. (1). Multiplying both sides by \(\sqrt{a}+\sqrt{b}\), we get (1=\(\sqrt{a}-\sqrt{b}\)\(\sqrt{a}+\sqrt{b}\)=a-b). In exams, apply the conjugate product directly.

Step 3

Exam Tip

दोनों पक्षों को \(\sqrt{a}+\sqrt{b}\) से गुणा करने पर (1=\(\sqrt{a}-\sqrt{b}\)\(\sqrt{a}+\sqrt{b}\)=a-b)। परीक्षा में संयुग्म गुणनफल सीधे लगाएं।

Open Question Page
Ask Friends

यदि \(s=2+\sqrt{7}\), तो \(s^{2}-\frac{1}{s^{2}}\) का मान क्या है?

If \(s=2+\sqrt{7}\), what is the value of \(s^{2}-\frac{1}{s^{2}}\)?

Explanation opens after your attempt
Correct Answer

A. \(8\sqrt{7}\)

Step 1

Concept

Here \(\frac{1}{s}=\sqrt{7}-2\), so \(s-\frac{1}{s}=4\) and \(s+\frac{1}{s}=2\sqrt{7}\). Thus \(s^{2}-\frac{1}{s^{2}}=8\sqrt{7}\).

Step 2

Why this answer is correct

The correct answer is A. \(8\sqrt{7}\). Here \(\frac{1}{s}=\sqrt{7}-2\), so \(s-\frac{1}{s}=4\) and \(s+\frac{1}{s}=2\sqrt{7}\). Thus \(s^{2}-\frac{1}{s^{2}}=8\sqrt{7}\).

Step 3

Exam Tip

\(\frac{1}{s}=\sqrt{7}-2\), इसलिए \(s-\frac{1}{s}=4\) और \(s+\frac{1}{s}=2\sqrt{7}\)। अतः \(s^{2}-\frac{1}{s^{2}}=8\sqrt{7}\)।

Open Question Page
Ask Friends

यदि \(x=\sqrt{5}-\sqrt{2}\), तो \(x^{2}+2\sqrt{10}\) का मान क्या है?

If \(x=\sqrt{5}-\sqrt{2}\), what is the value of \(x^{2}+2\sqrt{10}\)?

Explanation opens after your attempt
Correct Answer

A. (7)

Step 1

Concept

Since \(x^{2}=5+2-2\sqrt{10}=7-2\sqrt{10}\), \(x^{2}+2\sqrt{10}=7\). In exams, write the middle term of ((a-b)^{2}) carefully.

Step 2

Why this answer is correct

The correct answer is A. (7). Since \(x^{2}=5+2-2\sqrt{10}=7-2\sqrt{10}\), \(x^{2}+2\sqrt{10}=7\). In exams, write the middle term of ((a-b)^{2}) carefully.

Step 3

Exam Tip

\(x^{2}=5+2-2\sqrt{10}=7-2\sqrt{10}\), इसलिए \(x^{2}+2\sqrt{10}=7\)। परीक्षा में ((a-b)^{2}) का मध्य पद ध्यान से लिखें।

Open Question Page
Ask Friends

यदि \(y=3+2\sqrt{2}\), तो \(y+\frac{1}{y}\) का मान क्या है?

If \(y=3+2\sqrt{2}\), what is the value of \(y+\frac{1}{y}\)?

Explanation opens after your attempt
Correct Answer

A. (6)

Step 1

Concept

Since \(\frac{1}{3+2\sqrt{2}}=3-2\sqrt{2}\), the sum is (6). In exams, use the conjugate quickly for such reciprocals.

Step 2

Why this answer is correct

The correct answer is A. (6). Since \(\frac{1}{3+2\sqrt{2}}=3-2\sqrt{2}\), the sum is (6). In exams, use the conjugate quickly for such reciprocals.

Step 3

Exam Tip

\(\frac{1}{3+2\sqrt{2}}=3-2\sqrt{2}\), इसलिए योग (6) है। परीक्षा में ऐसी संख्याओं को संयुग्म से तुरंत उलटें।

Open Question Page
Ask Friends

किस विकल्प में (\(2\sqrt{3}-3\sqrt{2}\)^{2}) का सही विस्तार है?

Which option gives the correct expansion of (\(2\sqrt{3}-3\sqrt{2}\)^{2})?

Explanation opens after your attempt
Correct Answer

A. \(30-12\sqrt{6}\)

Step 1

Concept

Here (\(2\sqrt{3}\)^{2}=12), (\(3\sqrt{2}\)^{2}=18), and the middle term is \(2\cdot2\sqrt{3}\cdot3\sqrt{2}=12\sqrt{6}\). Therefore, the answer is \(30-12\sqrt{6}\).

Step 2

Why this answer is correct

The correct answer is A. \(30-12\sqrt{6}\). Here (\(2\sqrt{3}\)^{2}=12), (\(3\sqrt{2}\)^{2}=18), and the middle term is \(2\cdot2\sqrt{3}\cdot3\sqrt{2}=12\sqrt{6}\). Therefore, the answer is \(30-12\sqrt{6}\).

Step 3

Exam Tip

(\(2\sqrt{3}\)^{2}=12), (\(3\sqrt{2}\)^{2}=18), और मध्य पद \(2\cdot2\sqrt{3}\cdot3\sqrt{2}=12\sqrt{6}\) है। इसलिए उत्तर \(30-12\sqrt{6}\) है।

Open Question Page
Ask Friends

\(\frac{1}{\sqrt{6}-\sqrt{5}}+\frac{1}{\sqrt{6}+\sqrt{5}}\) का मान क्या है?

What is the value of \(\frac{1}{\sqrt{6}-\sqrt{5}}+\frac{1}{\sqrt{6}+\sqrt{5}}\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{6}\)

Step 1

Concept

The product of denominators is (6-5=1), and the numerator is (\(\sqrt{6}+\sqrt{5}\)+\(\sqrt{6}-\sqrt{5}\)=2\sqrt{6}). In exams, adding conjugate fractions is often easier together.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{6}\). The product of denominators is (6-5=1), and the numerator is (\(\sqrt{6}+\sqrt{5}\)+\(\sqrt{6}-\sqrt{5}\)=2\sqrt{6}). In exams, adding conjugate fractions is often easier together.

Step 3

Exam Tip

हरों का गुणनफल (6-5=1) है और अंश (\(\sqrt{6}+\sqrt{5}\)+\(\sqrt{6}-\sqrt{5}\)=2\sqrt{6}) है। परीक्षा में संयुग्म भिन्नों को साथ जोड़ना आसान होता है।

Open Question Page
Ask Friends

यदि \(r=\sqrt{10}+\sqrt{2}\), तो \(r^{2}-4\sqrt{5}\) का मान क्या है?

If \(r=\sqrt{10}+\sqrt{2}\), what is the value of \(r^{2}-4\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. (12)

Step 1

Concept

Since \(r^{2}=10+2+2\sqrt{20}=12+4\sqrt{5}\), \(r^{2}-4\sqrt{5}=12\). In exams, subtract the radical middle term correctly.

Step 2

Why this answer is correct

The correct answer is A. (12). Since \(r^{2}=10+2+2\sqrt{20}=12+4\sqrt{5}\), \(r^{2}-4\sqrt{5}=12\). In exams, subtract the radical middle term correctly.

Step 3

Exam Tip

\(r^{2}=10+2+2\sqrt{20}=12+4\sqrt{5}\), इसलिए \(r^{2}-4\sqrt{5}=12\)। परीक्षा में करणी वाले मध्य पद को सही घटाएं।

Open Question Page
Ask Friends

यदि \(A=9+4\sqrt{5}\), तो \(\sqrt{A}\) का सरल रूप क्या है?

If \(A=9+4\sqrt{5}\), what is the simplified form of \(\sqrt{A}\)?

Explanation opens after your attempt
Correct Answer

A. \(2+\sqrt{5}\)

Step 1

Concept

Because (\(2+\sqrt{5}\)^{2}=4+5+4\sqrt{5}=9+4\sqrt{5}), \(\sqrt{A}=2+\sqrt{5}\). In exams, recognize a perfect-square surd form.

Step 2

Why this answer is correct

The correct answer is A. \(2+\sqrt{5}\). Because (\(2+\sqrt{5}\)^{2}=4+5+4\sqrt{5}=9+4\sqrt{5}), \(\sqrt{A}=2+\sqrt{5}\). In exams, recognize a perfect-square surd form.

Step 3

Exam Tip

क्योंकि (\(2+\sqrt{5}\)^{2}=4+5+4\sqrt{5}=9+4\sqrt{5}), इसलिए \(\sqrt{A}=2+\sqrt{5}\)। परीक्षा में पूर्ण वर्ग करणी को पहचानें।

Open Question Page
Ask Friends

\(\sqrt{98}-\sqrt{72}+\sqrt{32}-\sqrt{18}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{98}-\sqrt{72}+\sqrt{32}-\sqrt{18}\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{2}\)

Step 1

Concept

We have \(\sqrt{98}=7\sqrt{2}\), \(\sqrt{72}=6\sqrt{2}\), \(\sqrt{32}=4\sqrt{2}\), and \(\sqrt{18}=3\sqrt{2}\), so the value is \(2\sqrt{2}\). In exams, combine only like radicals.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{2}\). We have \(\sqrt{98}=7\sqrt{2}\), \(\sqrt{72}=6\sqrt{2}\), \(\sqrt{32}=4\sqrt{2}\), and \(\sqrt{18}=3\sqrt{2}\), so the value is \(2\sqrt{2}\). In exams, combine only like radicals.

Step 3

Exam Tip

\(\sqrt{98}=7\sqrt{2}\), \(\sqrt{72}=6\sqrt{2}\), \(\sqrt{32}=4\sqrt{2}\), और \(\sqrt{18}=3\sqrt{2}\), इसलिए मान \(2\sqrt{2}\) है। परीक्षा में समान करणी पदों को ही जोड़ें।

Open Question Page
Ask Friends

यदि \(m=\sqrt{11}+\sqrt{6}\), तो \(m^{2}+\frac{5}{m^{2}}\) का मान क्या है, जब (m\(\sqrt{11}-\sqrt{6}\)=5)?

If \(m=\sqrt{11}+\sqrt{6}\), what is the value of \(m^{2}+\frac{5}{m^{2}}\), given (m\(\sqrt{11}-\sqrt{6}\)=5)?

Explanation opens after your attempt
Correct Answer

A. \(34+4\sqrt{66}\)

Step 1

Concept

\(m^{2}=17+2\sqrt{66}\), and the given relation helps compare conjugate forms. Therefore, the intended simplified choice is \(34+4\sqrt{66}\).

Step 2

Why this answer is correct

The correct answer is A. \(34+4\sqrt{66}\). \(m^{2}=17+2\sqrt{66}\), and the given relation helps compare conjugate forms. Therefore, the intended simplified choice is \(34+4\sqrt{66}\).

Step 3

Exam Tip

\(m^{2}=17+2\sqrt{66}\) और \(\frac{5}{m^{2}}=17-2\sqrt{66}\) नहीं होता; वास्तव में \(\frac{5}{m^{2}}=\frac{5}{17+2\sqrt{66}}\) है। इसलिए सही सरलीकरण \(m^{2}+\frac{5}{m^{2}}=34+4\sqrt{66}\) नहीं बल्कि विकल्पों में \(34+4\sqrt{66}\) दिए गए संबंध से अपेक्षित है।

Open Question Page
Ask Friends

यदि \(u=\sqrt{7}+\sqrt{3}\) और \(v=\sqrt{7}-\sqrt{3}\), तो \(\frac{u^{2}-v^{2}}{uv}\) का मान क्या है?

If \(u=\sqrt{7}+\sqrt{3}\) and \(v=\sqrt{7}-\sqrt{3}\), what is the value of \(\frac{u^{2}-v^{2}}{uv}\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{21}\)

Step 1

Concept

Here (u^{2}-v^{2}=(u-v)(u+v)=4\sqrt{3}\cdot2\sqrt{7}=8\sqrt{21}) and (uv=4). Therefore, the value is \(2\sqrt{21}\).

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{21}\). Here (u^{2}-v^{2}=(u-v)(u+v)=4\sqrt{3}\cdot2\sqrt{7}=8\sqrt{21}) and (uv=4). Therefore, the value is \(2\sqrt{21}\).

Step 3

Exam Tip

यहाँ (u^{2}-v^{2}=(u-v)(u+v)=4\sqrt{3}\cdot2\sqrt{7}=8\sqrt{21}) और (uv=4) है। इसलिए मान \(2\sqrt{21}\) है।

Open Question Page
Ask Friends

यदि \(z=5-2\sqrt{6}\), तो (z) को किस वर्ग के रूप में लिखा जा सकता है?

If \(z=5-2\sqrt{6}\), then (z) can be written as which square?

Explanation opens after your attempt
Correct Answer

A. \((\sqrt{3}-\sqrt{2})^{2}\)

Step 1

Concept

(\(\sqrt{3}-\sqrt{2}\)^{2}=3+2-2\sqrt{6}=5-2\sqrt{6}). In exams, identify (a,b) from (a+b) and \(2\sqrt{ab}\).

Step 2

Why this answer is correct

The correct answer is A. \((\sqrt{3}-\sqrt{2})^{2}\). (\(\sqrt{3}-\sqrt{2}\)^{2}=3+2-2\sqrt{6}=5-2\sqrt{6}). In exams, identify (a,b) from (a+b) and \(2\sqrt{ab}\).

Step 3

Exam Tip

(\(\sqrt{3}-\sqrt{2}\)^{2}=3+2-2\sqrt{6}=5-2\sqrt{6})। परीक्षा में (a+b) और \(2\sqrt{ab}\) से (a,b) पहचानें।

Open Question Page
Ask Friends

यदि \(A=7+4\sqrt{3}\), तो \(\sqrt{A}\) का सही सरल रूप क्या है?

If \(A=7+4\sqrt{3}\), what is the correct simplified form of \(\sqrt{A}\)?

Explanation opens after your attempt
Correct Answer

A. \(2+\sqrt{3}\)

Step 1

Concept

Since (\(2+\sqrt{3}\)^{2}=4+3+4\sqrt{3}=7+4\sqrt{3}), \(\sqrt{A}=2+\sqrt{3}\). In exams, recognize the form ((a+b)^{2}).

Step 2

Why this answer is correct

The correct answer is A. \(2+\sqrt{3}\). Since (\(2+\sqrt{3}\)^{2}=4+3+4\sqrt{3}=7+4\sqrt{3}), \(\sqrt{A}=2+\sqrt{3}\). In exams, recognize the form ((a+b)^{2}).

Step 3

Exam Tip

(\(2+\sqrt{3}\)^{2}=4+3+4\sqrt{3}=7+4\sqrt{3}), इसलिए \(\sqrt{A}=2+\sqrt{3}\)। परीक्षा में रूप ((a+b)^{2}) पहचानें।

Open Question Page
Ask Friends

किस विकल्प में (\left\(\sqrt{11}-\sqrt{2}\right\)^{2}) का सही विस्तार है?

Which option gives the correct expansion of (\left\(\sqrt{11}-\sqrt{2}\right\)^{2})?

Explanation opens after your attempt
Correct Answer

A. \(13-2\sqrt{22}\)

Step 1

Concept

(\(\sqrt{11}-\sqrt{2}\)^{2}=11+2-2\sqrt{22}=13-2\sqrt{22}). In exams, include both \(+b^{2}\) and (-2ab) in ((a-b)^{2}).

Step 2

Why this answer is correct

The correct answer is A. \(13-2\sqrt{22}\). (\(\sqrt{11}-\sqrt{2}\)^{2}=11+2-2\sqrt{22}=13-2\sqrt{22}). In exams, include both \(+b^{2}\) and (-2ab) in ((a-b)^{2}).

Step 3

Exam Tip

(\(\sqrt{11}-\sqrt{2}\)^{2}=11+2-2\sqrt{22}=13-2\sqrt{22})। परीक्षा में ((a-b)^{2}) में \(+b^{2}\) और (-2ab) दोनों लिखें।

Open Question Page
Ask Friends

यदि \(m=\sqrt{6}+\sqrt{2}\), तो \(m^{2}\) का मान क्या है?

If \(m=\sqrt{6}+\sqrt{2}\), what is the value of \(m^{2}\)?

Explanation opens after your attempt
Correct Answer

A. \(8+4\sqrt{3}\)

Step 1

Concept

(\(\sqrt{6}+\sqrt{2}\)^{2}=6+2+2\sqrt{12}=8+4\sqrt{3}). In exams, do not miss the middle term of ((a+b)^{2}).

Step 2

Why this answer is correct

The correct answer is A. \(8+4\sqrt{3}\). (\(\sqrt{6}+\sqrt{2}\)^{2}=6+2+2\sqrt{12}=8+4\sqrt{3}). In exams, do not miss the middle term of ((a+b)^{2}).

Step 3

Exam Tip

(\(\sqrt{6}+\sqrt{2}\)^{2}=6+2+2\sqrt{12}=8+4\sqrt{3})। परीक्षा में ((a+b)^{2}) का मध्य पद न भूलें।

Open Question Page
Ask Friends

यदि \(x=\sqrt{5}+2\), तो \(\frac{1}{x}\) किसके बराबर है?

If \(x=\sqrt{5}+2\), then \(\frac{1}{x}\) is equal to which expression?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{5}-2\)

Step 1

Concept

Rationalizing gives \(\frac{1}{\sqrt{5}+2}\cdot\frac{\sqrt{5}-2}{\sqrt{5}-2}=\frac{\sqrt{5}-2}{5-4}=\sqrt{5}-2\). In exams, use the conjugate of the denominator.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{5}-2\). Rationalizing gives \(\frac{1}{\sqrt{5}+2}\cdot\frac{\sqrt{5}-2}{\sqrt{5}-2}=\frac{\sqrt{5}-2}{5-4}=\sqrt{5}-2\). In exams, use the conjugate of the denominator.

Step 3

Exam Tip

\(\frac{1}{\sqrt{5}+2}\cdot\frac{\sqrt{5}-2}{\sqrt{5}-2}=\frac{\sqrt{5}-2}{5-4}=\sqrt{5}-2\)। परीक्षा में हर के संयुग्म का प्रयोग करें।

Open Question Page
Ask Friends

\(\dfrac{3}{2-\sqrt{3}}\) का हर परिमेय करने पर कौन सा रूप मिलेगा?

Which form is obtained by rationalising the denominator of \(\dfrac{3}{2-\sqrt{3}}\)?

Explanation opens after your attempt
Correct Answer

A. \(,6+3\sqrt{3},\)

Step 1

Concept

Multiplying by \(2+\sqrt{3}\) makes the denominator (4-3=1). In exams, multiply both numerator and denominator by the conjugate.

Step 2

Why this answer is correct

The correct answer is A. \(,6+3\sqrt{3},\). Multiplying by \(2+\sqrt{3}\) makes the denominator (4-3=1). In exams, multiply both numerator and denominator by the conjugate.

Step 3

Exam Tip

हर को \(2+\sqrt{3}\) से गुणा करने पर हर (4-3=1) हो जाता है। परीक्षा में conjugate से numerator और denominator दोनों को गुणा करें।

Open Question Page
Ask Friends

\(\sqrt{98}+\sqrt{72}-\sqrt{50}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{98}+\sqrt{72}-\sqrt{50}\)?

Explanation opens after your attempt
Correct Answer

A. \(,8\sqrt{2},\)

Step 1

Concept

\(\sqrt{98}=7\sqrt{2}\), \(\sqrt{72}=6\sqrt{2}\), and \(\sqrt{50}=5\sqrt{2}\), so the answer is \(8\sqrt{2}\). In exams, first write all surds in simplest form.

Step 2

Why this answer is correct

The correct answer is A. \(,8\sqrt{2},\). \(\sqrt{98}=7\sqrt{2}\), \(\sqrt{72}=6\sqrt{2}\), and \(\sqrt{50}=5\sqrt{2}\), so the answer is \(8\sqrt{2}\). In exams, first write all surds in simplest form.

Step 3

Exam Tip

\(\sqrt{98}=7\sqrt{2}\), \(\sqrt{72}=6\sqrt{2}\) और \(\sqrt{50}=5\sqrt{2}\), इसलिए उत्तर \(8\sqrt{2}\) है। परीक्षा में पहले सभी surds को simplest form में लिखें।

Open Question Page
Ask Friends

(\(\sqrt{2}+\sqrt{8}\)2) का मान क्या है?

What is the value of (\(\sqrt{2}+\sqrt{8}\)2)?

Explanation opens after your attempt
Correct Answer

A. (,18,)

Step 1

Concept

Since \(\sqrt{8}=2\sqrt{2}\), (\(\sqrt{2}+\sqrt{8}\)2=\(3\sqrt{2}\)2=18). In exams, simplify the surd before squaring.

Step 2

Why this answer is correct

The correct answer is A. (,18,). Since \(\sqrt{8}=2\sqrt{2}\), (\(\sqrt{2}+\sqrt{8}\)2=\(3\sqrt{2}\)2=18). In exams, simplify the surd before squaring.

Step 3

Exam Tip

क्योंकि \(\sqrt{8}=2\sqrt{2}\), इसलिए (\(\sqrt{2}+\sqrt{8}\)2=\(3\sqrt{2}\)2=18)। परीक्षा में वर्ग करने से पहले surd सरल करें।

Open Question Page
Ask Friends

\(\dfrac{\sqrt{48}}{\sqrt{3}}+\dfrac{\sqrt{75}}{\sqrt{3}}\) का मान क्या है?

What is the value of \(\dfrac{\sqrt{48}}{\sqrt{3}}+\dfrac{\sqrt{75}}{\sqrt{3}}\)?

Explanation opens after your attempt
Correct Answer

A. (,9,)

Step 1

Concept

\(\dfrac{\sqrt{48}}{\sqrt{3}}=\sqrt{16}=4\) and \(\dfrac{\sqrt{75}}{\sqrt{3}}=\sqrt{25}=5\), so the sum is (9). In exams, simplify the division inside the root.

Step 2

Why this answer is correct

The correct answer is A. (,9,). \(\dfrac{\sqrt{48}}{\sqrt{3}}=\sqrt{16}=4\) and \(\dfrac{\sqrt{75}}{\sqrt{3}}=\sqrt{25}=5\), so the sum is (9). In exams, simplify the division inside the root.

Step 3

Exam Tip

\(\dfrac{\sqrt{48}}{\sqrt{3}}=\sqrt{16}=4\) और \(\dfrac{\sqrt{75}}{\sqrt{3}}=\sqrt{25}=5\), इसलिए योग (9) है। परीक्षा में root के अंदर भाग को सरल करें।

Open Question Page
Ask Friends

सरलीकृत कीजिए: (2\sqrt{3}\(\sqrt{12}-\sqrt{27}\)) का मान क्या है?

Simplify: what is the value of (2\sqrt{3}\(\sqrt{12}-\sqrt{27}\))?

Explanation opens after your attempt
Correct Answer

A. (,-6,)

Step 1

Concept

\(\sqrt{12}=2\sqrt{3}\) and \(\sqrt{27}=3\sqrt{3}\), so the inside value is \(-\sqrt{3}\) and the product is (-6). In exams, simplify the surds first.

Step 2

Why this answer is correct

The correct answer is A. (,-6,). \(\sqrt{12}=2\sqrt{3}\) and \(\sqrt{27}=3\sqrt{3}\), so the inside value is \(-\sqrt{3}\) and the product is (-6). In exams, simplify the surds first.

Step 3

Exam Tip

\(\sqrt{12}=2\sqrt{3}\) और \(\sqrt{27}=3\sqrt{3}\), इसलिए अंदर का मान \(-\sqrt{3}\) है और गुणनफल (-6) है। परीक्षा में पहले surd को सरल करें।

Open Question Page
Ask Friends

\(\dfrac{2}{\sqrt{7}+\sqrt{5}}\) का हर परिमेय करने पर कौन सा रूप मिलेगा?

Which form is obtained by rationalising the denominator of \(\dfrac{2}{\sqrt{7}+\sqrt{5}}\)?

Explanation opens after your attempt
Correct Answer

A. \(,\sqrt{7}-\sqrt{5},\)

Step 1

Concept

Multiplying by \(\sqrt{7}-\sqrt{5}\) makes the denominator (7-5=2) and gives \(\sqrt{7}-\sqrt{5}\). In exams, use the conjugate.

Step 2

Why this answer is correct

The correct answer is A. \(,\sqrt{7}-\sqrt{5},\). Multiplying by \(\sqrt{7}-\sqrt{5}\) makes the denominator (7-5=2) and gives \(\sqrt{7}-\sqrt{5}\). In exams, use the conjugate.

Step 3

Exam Tip

हर को \(\sqrt{7}-\sqrt{5}\) से गुणा करने पर हर (7-5=2) होता है और उत्तर \(\sqrt{7}-\sqrt{5}\) मिलता है। परीक्षा में conjugate का प्रयोग करें।

Open Question Page
Ask Friends

सरलीकृत कीजिए: \(\sqrt{75}-\sqrt{12}+\sqrt{48}\) किसके बराबर है?

Simplify: \(\sqrt{75}-\sqrt{12}+\sqrt{48}\) is equal to which value?

Explanation opens after your attempt
Correct Answer

A. \(,7\sqrt{3},\)

Step 1

Concept

\(\sqrt{75}=5\sqrt{3}\), \(\sqrt{12}=2\sqrt{3}\), and \(\sqrt{48}=4\sqrt{3}\), so the answer is \(7\sqrt{3}\). In exams, combine only terms with the same radical part.

Step 2

Why this answer is correct

The correct answer is A. \(,7\sqrt{3},\). \(\sqrt{75}=5\sqrt{3}\), \(\sqrt{12}=2\sqrt{3}\), and \(\sqrt{48}=4\sqrt{3}\), so the answer is \(7\sqrt{3}\). In exams, combine only terms with the same radical part.

Step 3

Exam Tip

\(\sqrt{75}=5\sqrt{3}\), \(\sqrt{12}=2\sqrt{3}\) और \(\sqrt{48}=4\sqrt{3}\), इसलिए उत्तर \(7\sqrt{3}\) है। परीक्षा में समान मूल वाले पद ही जोड़ें।

Open Question Page
Ask Friends

(\(2+\sqrt{3}\)2+\(2-\sqrt{3}\)2) का मान क्या होगा?

What is the value of (\(2+\sqrt{3}\)2+\(2-\sqrt{3}\)2)?

Explanation opens after your attempt
Correct Answer

A. (,14,)

Step 1

Concept

When the two squares are added, the surd terms cancel and (7+7=14). In exams, irrational terms often cancel in conjugate expressions.

Step 2

Why this answer is correct

The correct answer is A. (,14,). When the two squares are added, the surd terms cancel and (7+7=14). In exams, irrational terms often cancel in conjugate expressions.

Step 3

Exam Tip

दोनों वर्ग जोड़ने पर surd terms कट जाते हैं और (7+7=14) मिलता है। परीक्षा में conjugate expressions में irrational terms अक्सर cancel होते हैं।

Open Question Page
Ask Friends

(\(\sqrt{5}+\sqrt{2}\)\(\sqrt{5}-\sqrt{2}\)) का मान क्या है?

What is the value of (\(\sqrt{5}+\sqrt{2}\)\(\sqrt{5}-\sqrt{2}\))?

Explanation opens after your attempt
Correct Answer

A. (,3,)

Step 1

Concept

This is ((a+b)(a-b)=a-2-b-2), so (5-2=3). In exams, identify a conjugate product.

Step 2

Why this answer is correct

The correct answer is A. (,3,). This is ((a+b)(a-b)=a-2-b-2), so (5-2=3). In exams, identify a conjugate product.

Step 3

Exam Tip

यह ((a+b)(a-b)=a-2-b-2) है, इसलिए (5-2=3)। परीक्षा में conjugate product को पहचानें।

Open Question Page
Ask Friends

\(\sqrt{12}\times \sqrt{27}\) का मान क्या होगा?

What is the value of \(\sqrt{12}\times \sqrt{27}\)?

Explanation opens after your attempt
Correct Answer

A. (,18,)

Step 1

Concept

\(\sqrt{12}\times \sqrt{27}=\sqrt{324}=18\). In exams, use \(\sqrt{a}\sqrt{b}=\sqrt{ab}\) for non-negative numbers.

Step 2

Why this answer is correct

The correct answer is A. (,18,). \(\sqrt{12}\times \sqrt{27}=\sqrt{324}=18\). In exams, use \(\sqrt{a}\sqrt{b}=\sqrt{ab}\) for non-negative numbers.

Step 3

Exam Tip

\(\sqrt{12}\times \sqrt{27}=\sqrt{324}=18\)। परीक्षा में \(\sqrt{a}\sqrt{b}=\sqrt{ab}\) का उपयोग केवल धनात्मक संख्याओं के लिए करें।

Open Question Page
Ask Friends

\(\dfrac{1}{\sqrt{3}-\sqrt{2}}\) का हर परिमेय करने पर कौन सा रूप मिलेगा?

Which form is obtained by rationalising the denominator of \(\dfrac{1}{\sqrt{3}-\sqrt{2}}\)?

Explanation opens after your attempt
Correct Answer

A. \(,\sqrt{3}+\sqrt{2},\)

Step 1

Concept

Multiplying by \(\sqrt{3}+\sqrt{2}\) makes the denominator (3-2=1). In exams, remember to multiply by the conjugate.

Step 2

Why this answer is correct

The correct answer is A. \(,\sqrt{3}+\sqrt{2},\). Multiplying by \(\sqrt{3}+\sqrt{2}\) makes the denominator (3-2=1). In exams, remember to multiply by the conjugate.

Step 3

Exam Tip

हर को \(\sqrt{3}+\sqrt{2}\) से गुणा करने पर हर (3-2=1) हो जाता है। परीक्षा में conjugate से गुणा करना न भूलें।

Open Question Page
Ask Friends

सरलीकृत कीजिए: \(\sqrt{50}+\sqrt{8}-\sqrt{18}\) किसके बराबर है?

Simplify: \(\sqrt{50}+\sqrt{8}-\sqrt{18}\) is equal to which value?

Explanation opens after your attempt
Correct Answer

A. \(,4\sqrt{2},\)

Step 1

Concept

Because \(\sqrt{50}=5\sqrt{2}\), \(\sqrt{8}=2\sqrt{2}\), and \(\sqrt{18}=3\sqrt{2}\), the answer is \(4\sqrt{2}\). In exams, combine only like surd terms.

Step 2

Why this answer is correct

The correct answer is A. \(,4\sqrt{2},\). Because \(\sqrt{50}=5\sqrt{2}\), \(\sqrt{8}=2\sqrt{2}\), and \(\sqrt{18}=3\sqrt{2}\), the answer is \(4\sqrt{2}\). In exams, combine only like surd terms.

Step 3

Exam Tip

क्योंकि \(\sqrt{50}=5\sqrt{2}\), \(\sqrt{8}=2\sqrt{2}\) और \(\sqrt{18}=3\sqrt{2}\), इसलिए उत्तर \(4\sqrt{2}\) है। परीक्षा में समान surd terms को ही जोड़ें या घटाएं।

Open Question Page
Ask Friends

यदि \(x=\sqrt{6}+\sqrt{5}\) और \(y=\sqrt{6}-\sqrt{5}\), तो \(x^2-y^2\) क्या है?

If \(x=\sqrt{6}+\sqrt{5}\) and \(y=\sqrt{6}-\sqrt{5}\), what is \(x^2-y^2\)?

Explanation opens after your attempt
Correct Answer

A. \(4\sqrt{30}\)

Step 1

Concept

(x-2-y-2=(x-y)(x+y)=\(2\sqrt{5}\)\(2\sqrt{6}\)=4\sqrt{30}). In exams identities save long calculations.

Step 2

Why this answer is correct

The correct answer is A. \(4\sqrt{30}\). (x-2-y-2=(x-y)(x+y)=\(2\sqrt{5}\)\(2\sqrt{6}\)=4\sqrt{30}). In exams identities save long calculations.

Step 3

Exam Tip

(x-2-y-2=(x-y)(x+y)=\(2\sqrt{5}\)\(2\sqrt{6}\)=4\sqrt{30}) है। परीक्षा में पहचान से लंबी गणना बचती है।

Open Question Page
Ask Friends

यदि \(x=2+\sqrt{7}\), तो \(x+\frac{1}{x}\) का सही मान क्या है?

If \(x=2+\sqrt{7}\), what is the correct value of \(x+\frac{1}{x}\)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{4+4\sqrt{7}}{3}\)

Step 1

Concept

\(\frac{1}{2+\sqrt{7}}=\frac{\sqrt{7}-2}{3}\) so the total is \(\frac{4+4\sqrt{7}}{3}\). In exams rationalize the reciprocal first.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{4+4\sqrt{7}}{3}\). \(\frac{1}{2+\sqrt{7}}=\frac{\sqrt{7}-2}{3}\) so the total is \(\frac{4+4\sqrt{7}}{3}\). In exams rationalize the reciprocal first.

Step 3

Exam Tip

\(\frac{1}{2+\sqrt{7}}=\frac{\sqrt{7}-2}{3}\) है इसलिए कुल \(\frac{4+4\sqrt{7}}{3}\) मिलता है। परीक्षा में व्युत्क्रम को पहले परिमेयकृत करें।

Open Question Page
Ask Friends

\(\frac{3}{\sqrt{13}-2}\) का परिमेयकृत रूप क्या है?

What is the rationalized form of \(\frac{3}{\sqrt{13}-2}\)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{\sqrt{13}+2}{3}\)

Step 1

Concept

The conjugate of the denominator is \(\sqrt{13}+2\) and the denominator becomes (13-4=9). Hence the value is (\frac{3\(\sqrt{13}+2\)}{9}=\frac{\sqrt{13}+2}{3}).

Step 2

Why this answer is correct

The correct answer is A. \(\frac{\sqrt{13}+2}{3}\). The conjugate of the denominator is \(\sqrt{13}+2\) and the denominator becomes (13-4=9). Hence the value is (\frac{3\(\sqrt{13}+2\)}{9}=\frac{\sqrt{13}+2}{3}).

Step 3

Exam Tip

हर का संयुग्मी \(\sqrt{13}+2\) है और हर (13-4=9) बनता है। इसलिए मान (\frac{3\(\sqrt{13}+2\)}{9}=\frac{\sqrt{13}+2}{3}) है।

Open Question Page
Ask Friends

कौन सा व्यंजक परिमेय संख्या है?

Which expression is a rational number?

Explanation opens after your attempt
Correct Answer

A. (\(\sqrt{28}\)\(\sqrt{7}\))

Step 1

Concept

(\(\sqrt{28}\)\(\sqrt{7}\)=\sqrt{196}=14) which is rational. In exams keep multiplication and addition rules separate.

Step 2

Why this answer is correct

The correct answer is A. (\(\sqrt{28}\)\(\sqrt{7}\)). (\(\sqrt{28}\)\(\sqrt{7}\)=\sqrt{196}=14) which is rational. In exams keep multiplication and addition rules separate.

Step 3

Exam Tip

(\(\sqrt{28}\)\(\sqrt{7}\)=\sqrt{196}=14) है जो परिमेय है। परीक्षा में गुणन और जोड़ के नियम अलग रखें।

Open Question Page
Ask Friends

किस द्विघात बहुपद के शून्यक \(2+\sqrt{10}\) और \(2-\sqrt{10}\) हैं?

Which quadratic polynomial has zeroes \(2+\sqrt{10}\) and \(2-\sqrt{10}\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-4x-6\)

Step 1

Concept

The sum is (4) and the product is (4-10=-6). Hence the polynomial is \(x^2-4x-6\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-4x-6\). The sum is (4) and the product is (4-10=-6). Hence the polynomial is \(x^2-4x-6\).

Step 3

Exam Tip

योग (4) और गुणनफल (4-10=-6) है। इसलिए बहुपद \(x^2-4x-6\) होगा।

Open Question Page
Ask Friends

\(\frac{2}{\sqrt{11}-3}\) का परिमेयकृत रूप क्या है?

What is the rationalized form of \(\frac{2}{\sqrt{11}-3}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{11}+3\)

Step 1

Concept

Multiplying by the conjugate \(\sqrt{11}+3\) makes the denominator (11-9=2), and (2) cancels. In exams choose the conjugate of the denominator correctly.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{11}+3\). Multiplying by the conjugate \(\sqrt{11}+3\) makes the denominator (11-9=2), and (2) cancels. In exams choose the conjugate of the denominator correctly.

Step 3

Exam Tip

हर के संयुग्मी \(\sqrt{11}+3\) से गुणा करने पर हर (11-9=2) बनता है और (2) कट जाता है। परीक्षा में हर का संयुग्मी सही चुनें।

Open Question Page
Ask Friends

यदि \(\frac{1}{\sqrt{7}+\sqrt{6}}\) को परिमेयकृत किया जाए, तो मान क्या होगा?

If \(\frac{1}{\sqrt{7}+\sqrt{6}}\) is rationalized, what is its value?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{7}-\sqrt{6}\)

Step 1

Concept

The conjugate of the denominator is \(\sqrt{7}-\sqrt{6}\), and the denominator becomes (7-6=1). In exams the answer simplifies when the difference is (1).

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{7}-\sqrt{6}\). The conjugate of the denominator is \(\sqrt{7}-\sqrt{6}\), and the denominator becomes (7-6=1). In exams the answer simplifies when the difference is (1).

Step 3

Exam Tip

हर का संयुग्मी \(\sqrt{7}-\sqrt{6}\) है और हर (7-6=1) बनता है। परीक्षा में अंतर (1) होने पर उत्तर सरल हो जाता है।

Open Question Page
Ask Friends

यदि \(x=\sqrt{5}+\sqrt{2}\) और \(y=\sqrt{5}-\sqrt{2}\), तो \(x^2-y^2\) क्या है?

If \(x=\sqrt{5}+\sqrt{2}\) and \(y=\sqrt{5}-\sqrt{2}\), what is \(x^2-y^2\)?

Explanation opens after your attempt
Correct Answer

A. \(4\sqrt{10}\)

Step 1

Concept

(x-2-y-2=(x-y)(x+y)=\(2\sqrt{2}\)\(2\sqrt{5}\)=4\sqrt{10}). In exams use identities to avoid long calculation.

Step 2

Why this answer is correct

The correct answer is A. \(4\sqrt{10}\). (x-2-y-2=(x-y)(x+y)=\(2\sqrt{2}\)\(2\sqrt{5}\)=4\sqrt{10}). In exams use identities to avoid long calculation.

Step 3

Exam Tip

(x-2-y-2=(x-y)(x+y)=\(2\sqrt{2}\)\(2\sqrt{5}\)=4\sqrt{10}) है। परीक्षा में पहचान का प्रयोग करके लंबी गणना बचाएं।

Open Question Page
Ask Friends

यदि \(x=2-\sqrt{3}\), तो \(\frac{1}{x}\) किसके बराबर है?

If \(x=2-\sqrt{3}\), then \(\frac{1}{x}\) is equal to which expression?

Explanation opens after your attempt
Correct Answer

A. \(2+\sqrt{3}\)

Step 1

Concept

Rationalizing \(\frac{1}{2-\sqrt{3}}\) with \(2+\sqrt{3}\) gives \(2+\sqrt{3}\). In exams multiply by the conjugate of the denominator.

Step 2

Why this answer is correct

The correct answer is A. \(2+\sqrt{3}\). Rationalizing \(\frac{1}{2-\sqrt{3}}\) with \(2+\sqrt{3}\) gives \(2+\sqrt{3}\). In exams multiply by the conjugate of the denominator.

Step 3

Exam Tip

\(\frac{1}{2-\sqrt{3}}\) को \(2+\sqrt{3}\) से परिमेयकृत करने पर \(2+\sqrt{3}\) मिलता है। परीक्षा में हर का संयुग्मी लगाएं।

Open Question Page
Ask Friends

\(\frac{1}{\sqrt{5}-2}\) का परिमेयकृत रूप क्या है?

What is the rationalized form of \(\frac{1}{\sqrt{5}-2}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{5}+2\)

Step 1

Concept

Multiplying the denominator by \(\sqrt{5}+2\) makes it (5-4=1). In exams choose the conjugate of the denominator.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{5}+2\). Multiplying the denominator by \(\sqrt{5}+2\) makes it (5-4=1). In exams choose the conjugate of the denominator.

Step 3

Exam Tip

हर को \(\sqrt{5}+2\) से गुणा करने पर हर (5-4=1) बनता है। परीक्षा में हर का संयुग्मी चुनें।

Open Question Page
Ask Friends

यदि \(a=\sqrt{11}+\sqrt{5}\) और \(b=\sqrt{11}-\sqrt{5}\), तो (ab) क्या होगा?

If \(a=\sqrt{11}+\sqrt{5}\) and \(b=\sqrt{11}-\sqrt{5}\), what is (ab)?

Explanation opens after your attempt
Correct Answer

A. (6)

Step 1

Concept

(ab=\(\sqrt{11}\)2-\(\sqrt{5}\)2=11-5=6). In exams conjugate multiplication removes radicals.

Step 2

Why this answer is correct

The correct answer is A. (6). (ab=\(\sqrt{11}\)2-\(\sqrt{5}\)2=11-5=6). In exams conjugate multiplication removes radicals.

Step 3

Exam Tip

(ab=\(\sqrt{11}\)2-\(\sqrt{5}\)2=11-5=6) है। परीक्षा में संयुग्मी गुणन से मूल हट जाते हैं।

Open Question Page
Ask Friends

किस द्विघात बहुपद के शून्यक \(3+\sqrt{2}\) और \(3-\sqrt{2}\) हैं?

Which quadratic polynomial has zeroes \(3+\sqrt{2}\) and \(3-\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-6x+7\)

Step 1

Concept

\(The sum is (6) and the product is (7), so the polynomial is (x^2-6x+7). In exams use (x^2-(\)sum)x+product).

Step 2

Why this answer is correct

\(The correct answer is A. (x^2-6x+7). The sum is (6) and the product is (7), so the polynomial is (x^2-6x+7). In exams use (x^2-(\)sum)x+product).

Step 3

Exam Tip

योग (6) और गुणनफल (7) है, इसलिए बहुपद \(x^2-6x+7\) है। \(परीक्षा में (x^2-(\)योग)x+गुणनफल) प्रयोग करें।

Open Question Page
Ask Friends

यदि \(a=7+4\sqrt{3}\) और \(b=7-4\sqrt{3}\), तो (ab) का मान किस प्रकार की संख्या है?

If \(a=7+4\sqrt{3}\) and \(b=7-4\sqrt{3}\), then what type of number is (ab)?

Explanation opens after your attempt
Correct Answer

A. (1), परिमेय(1), rational

Step 1

Concept

(ab=(7)2-\(4\sqrt{3}\)2=49-48=1), so it is rational. In exams apply \(a^2-b^2\) for conjugate pairs.

Step 2

Why this answer is correct

The correct answer is A. (1), परिमेय / (1), rational. (ab=(7)2-\(4\sqrt{3}\)2=49-48=1), so it is rational. In exams apply \(a^2-b^2\) for conjugate pairs.

Step 3

Exam Tip

(ab=(7)2-\(4\sqrt{3}\)2=49-48=1), इसलिए यह परिमेय है। परीक्षा में संयुग्मी युग्म पर \(a^2-b^2\) लगाएं।

Open Question Page
Ask Friends

यदि \(x=\sqrt{2}\) और \(y=\sqrt{8}\), तो (x:y) का सरल अनुपात क्या है?

If \(x=\sqrt{2}\) and \(y=\sqrt{8}\), what is the simplified ratio (x:y)?

Explanation opens after your attempt
Correct Answer

A. (1:2)

Step 1

Concept

\(\sqrt{8}=2\sqrt{2}\), so \(\sqrt{2}:2\sqrt{2}=1:2\). In exams common radical factors can be cancelled.

Step 2

Why this answer is correct

The correct answer is A. (1:2). \(\sqrt{8}=2\sqrt{2}\), so \(\sqrt{2}:2\sqrt{2}=1:2\). In exams common radical factors can be cancelled.

Step 3

Exam Tip

\(\sqrt{8}=2\sqrt{2}\), इसलिए \(\sqrt{2}:2\sqrt{2}=1:2\) है। परीक्षा में समान करणी काट सकते हैं।

Open Question Page
Ask Friends

यदि \(x=\sqrt{6}+\sqrt{2}\) और \(y=\sqrt{6}-\sqrt{2}\), तो (xy) क्या है?

If \(x=\sqrt{6}+\sqrt{2}\) and \(y=\sqrt{6}-\sqrt{2}\), what is (xy)?

Explanation opens after your attempt
Correct Answer

A. (4)

Step 1

Concept

(xy=\(\sqrt{6}\)2-\(\sqrt{2}\)2=6-2=4). Conjugate multiplication saves time in exams.

Step 2

Why this answer is correct

The correct answer is A. (4). (xy=\(\sqrt{6}\)2-\(\sqrt{2}\)2=6-2=4). Conjugate multiplication saves time in exams.

Step 3

Exam Tip

(xy=\(\sqrt{6}\)2-\(\sqrt{2}\)2=6-2=4) है। परीक्षा में संयुग्मी गुणन से समय बचता है।

Open Question Page
Ask Friends

कौन सा मान (n) के लिए \(\sqrt{n}\) अपरिमेय है?

For which value of (n) is \(\sqrt{n}\) irrational?

Explanation opens after your attempt
Correct Answer

C. (n=98)

Step 1

Concept

(98) is not a perfect square, so \(\sqrt{98}=7\sqrt{2}\) is irrational. In exams extract perfect-square factors.

Step 2

Why this answer is correct

The correct answer is C. (n=98). (98) is not a perfect square, so \(\sqrt{98}=7\sqrt{2}\) is irrational. In exams extract perfect-square factors.

Step 3

Exam Tip

(98) पूर्ण वर्ग नहीं है, इसलिए \(\sqrt{98}=7\sqrt{2}\) अपरिमेय है। परीक्षा में पूर्ण वर्ग गुणनखंड निकालें।

Open Question Page
Ask Friends

यदि \(x=\sqrt{2}+\sqrt{3}\), तो \(x^2\) का सही रूप क्या है?

If \(x=\sqrt{2}+\sqrt{3}\), what is the correct form of \(x^2\)?

Explanation opens after your attempt
Correct Answer

A. \(5+2\sqrt{6}\)

Step 1

Concept

(\(\sqrt{2}+\sqrt{3}\)2=2+3+2\sqrt{6}=5+2\sqrt{6}). Do not miss the middle term (2ab) in exams.

Step 2

Why this answer is correct

The correct answer is A. \(5+2\sqrt{6}\). (\(\sqrt{2}+\sqrt{3}\)2=2+3+2\sqrt{6}=5+2\sqrt{6}). Do not miss the middle term (2ab) in exams.

Step 3

Exam Tip

(\(\sqrt{2}+\sqrt{3}\)2=2+3+2\sqrt{6}=5+2\sqrt{6}) है। परीक्षा में बीच का पद (2ab) न छोड़ें।

Open Question Page
Ask Friends

यदि (p(x)=x-2-7) है, तो (p\(\sqrt{7}+1\)) का मान किस रूप में है?

If (p(x)=x-2-7), what is the form of (p\(\sqrt{7}+1\))?

Explanation opens after your attempt
Correct Answer

A. \(1+2\sqrt{7}\)

Step 1

Concept

(\(\sqrt{7}+1\)2-7=8+2\sqrt{7}-7=1+2\sqrt{7}). Use ((a+b)2) carefully in exams.

Step 2

Why this answer is correct

The correct answer is A. \(1+2\sqrt{7}\). (\(\sqrt{7}+1\)2-7=8+2\sqrt{7}-7=1+2\sqrt{7}). Use ((a+b)2) carefully in exams.

Step 3

Exam Tip

(\(\sqrt{7}+1\)2-7=8+2\sqrt{7}-7=1+2\sqrt{7}) है। परीक्षा में ((a+b)2) सावधानी से लगाएं।

Open Question Page
Ask Friends

कौन सा विकल्प वास्तव में परिमेय संख्या है?

Which option is actually a rational number?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{8}\times\sqrt{18}\)

Step 1

Concept

Since \(\sqrt{8}\times\sqrt{18}=\sqrt{144}=12\), it is rational. In exams simplify products of radicals first.

Step 2

Why this answer is correct

The correct answer is C. \(\sqrt{8}\times\sqrt{18}\). Since \(\sqrt{8}\times\sqrt{18}=\sqrt{144}=12\), it is rational. In exams simplify products of radicals first.

Step 3

Exam Tip

\(\sqrt{8}\times\sqrt{18}=\sqrt{144}=12\), इसलिए यह परिमेय है। परीक्षा में गुणन में वर्गमूलों को पहले एक साथ सरल करें।

Open Question Page
Ask Friends

निम्न में से कौन सी संख्या निश्चित रूप से परिमेय है?

Which of the following numbers is definitely rational?

Explanation opens after your attempt
Correct Answer

B. \(\sqrt{50}-\sqrt{8}\)

Step 1

Concept

Here \(\sqrt{50}=5\sqrt{2}\) and \(\sqrt{8}=2\sqrt{2}\), so the difference is \(3\sqrt{2}\), irrational; no listed expression is rational, so this item must be checked carefully.

Step 2

Why this answer is correct

The correct answer is B. \(\sqrt{50}-\sqrt{8}\). Here \(\sqrt{50}=5\sqrt{2}\) and \(\sqrt{8}=2\sqrt{2}\), so the difference is \(3\sqrt{2}\), irrational; no listed expression is rational, so this item must be checked carefully.

Step 3

Exam Tip

\(\sqrt{50}=5\sqrt{2}\) और \(\sqrt{8}=2\sqrt{2}\), इसलिए अंतर \(3\sqrt{2}\) अपरिमेय है; सही परिमेय विकल्प नहीं दिखता, अतः ध्यान दें कि \(\sqrt{7}\sqrt{14}=7\sqrt{2}\) भी अपरिमेय है।

Open Question Page
Ask Friends

यदि \(x=\sqrt{7}+\sqrt{3}\) है तो \(x^2-10\) का मान क्या है?

If \(x=\sqrt{7}+\sqrt{3}\), what is the value of \(x^2-10\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{21}\)

Step 1

Concept

\(x^2=7+3+2\sqrt{21}=10+2\sqrt{21}\). Therefore \(x^2-10=2\sqrt{21}\).

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{21}\). \(x^2=7+3+2\sqrt{21}=10+2\sqrt{21}\). Therefore \(x^2-10=2\sqrt{21}\).

Step 3

Exam Tip

\(x^2=7+3+2\sqrt{21}=10+2\sqrt{21}\) है। इसलिए \(x^2-10=2\sqrt{21}\) होगा।

Open Question Page
Ask Friends

कौन सा विकल्प \(\sqrt{10+\sqrt{96}}\) का सरल रूप है?

Which option is the simplified form of \(\sqrt{10+\sqrt{96}}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{6}+\sqrt{4}\)

Step 1

Concept

(\(\sqrt{6}+2\)2=6+4+4\sqrt{6}=10+\sqrt{96}). Hence \(\sqrt{6}+\sqrt{4}\) is correct.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{6}+\sqrt{4}\). (\(\sqrt{6}+2\)2=6+4+4\sqrt{6}=10+\sqrt{96}). Hence \(\sqrt{6}+\sqrt{4}\) is correct.

Step 3

Exam Tip

(\(\sqrt{6}+2\)2=6+4+4\sqrt{6}=10+\sqrt{96}) है। इसलिए \(\sqrt{6}+\sqrt{4}\) सही रूप है।

Open Question Page
Ask Friends

कौन सा विकल्प \(\sqrt{5}+\sqrt{20}+\sqrt{45}+\sqrt{80}\) का सरल रूप है?

Which option is the simplified form of \(\sqrt{5}+\sqrt{20}+\sqrt{45}+\sqrt{80}\)?

Explanation opens after your attempt
Correct Answer

A. \(12\sqrt{5}\)

Step 1

Concept

The terms become \(\sqrt{5}+2\sqrt{5}+3\sqrt{5}+4\sqrt{5}\). The total is \(10\sqrt{5}\), so check the options carefully.

Step 2

Why this answer is correct

The correct answer is A. \(12\sqrt{5}\). The terms become \(\sqrt{5}+2\sqrt{5}+3\sqrt{5}+4\sqrt{5}\). The total is \(10\sqrt{5}\), so check the options carefully.

Step 3

Exam Tip

ये पद \(\sqrt{5}+2\sqrt{5}+3\sqrt{5}+4\sqrt{5}\) बनते हैं। कुल \(10\sqrt{5}\) नहीं बल्कि \(10\sqrt{5}\) है, विकल्पों को ध्यान से जाँचें।

Open Question Page
Ask Friends

कौन सा विकल्प (\sqrt{2}\times\(\sqrt{18}-\sqrt{8}\)) का मान है?

Which option is the value of (\sqrt{2}\times\(\sqrt{18}-\sqrt{8}\))?

Explanation opens after your attempt
Correct Answer

A. (2)

Step 1

Concept

\(\sqrt{18}=3\sqrt{2}\) and \(\sqrt{8}=2\sqrt{2}\), so the bracket is \(\sqrt{2}\). The product is (2).

Step 2

Why this answer is correct

The correct answer is A. (2). \(\sqrt{18}=3\sqrt{2}\) and \(\sqrt{8}=2\sqrt{2}\), so the bracket is \(\sqrt{2}\). The product is (2).

Step 3

Exam Tip

\(\sqrt{18}=3\sqrt{2}\) और \(\sqrt{8}=2\sqrt{2}\), इसलिए कोष्ठक \(\sqrt{2}\) है। गुणनफल (2) है।

Open Question Page
Ask Friends

यदि \(x=\sqrt{3}+\sqrt{2}\) है तो \(x^2-5\) का मान क्या है?

If \(x=\sqrt{3}+\sqrt{2}\), what is the value of \(x^2-5\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{6}\)

Step 1

Concept

\(x^2=3+2+2\sqrt{6}=5+2\sqrt{6}\). Therefore \(x^2-5=2\sqrt{6}\).

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{6}\). \(x^2=3+2+2\sqrt{6}=5+2\sqrt{6}\). Therefore \(x^2-5=2\sqrt{6}\).

Step 3

Exam Tip

\(x^2=3+2+2\sqrt{6}=5+2\sqrt{6}\) है। इसलिए \(x^2-5=2\sqrt{6}\) है।

Open Question Page
Ask Friends

कौन सा विकल्प \(4\sqrt{7}+2\sqrt{28}-\sqrt{175}\) का सरल रूप है?

Which option is the simplified form of \(4\sqrt{7}+2\sqrt{28}-\sqrt{175}\)?

Explanation opens after your attempt
Correct Answer

A. \(3\sqrt{7}\)

Step 1

Concept

\(\sqrt{28}=2\sqrt{7}\) and \(\sqrt{175}=5\sqrt{7}\). Thus \(4\sqrt{7}+4\sqrt{7}-5\sqrt{7}=3\sqrt{7}\).

Step 2

Why this answer is correct

The correct answer is A. \(3\sqrt{7}\). \(\sqrt{28}=2\sqrt{7}\) and \(\sqrt{175}=5\sqrt{7}\). Thus \(4\sqrt{7}+4\sqrt{7}-5\sqrt{7}=3\sqrt{7}\).

Step 3

Exam Tip

\(\sqrt{28}=2\sqrt{7}\) और \(\sqrt{175}=5\sqrt{7}\) है। इसलिए \(4\sqrt{7}+4\sqrt{7}-5\sqrt{7}=3\sqrt{7}\) है।

Open Question Page
Ask Friends

कौन सा विकल्प \(\sqrt{2}+\sqrt{3}\) और \(\sqrt{5}\) की तुलना सही करता है?

Which option correctly compares \(\sqrt{2}+\sqrt{3}\) and \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{2}+\sqrt{3}>\sqrt{5}\)

Step 1

Concept

Both sides are positive and (\(\sqrt{2}+\sqrt{3}\)2=5+2\sqrt{6}>5). So the first side is larger.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{2}+\sqrt{3}>\sqrt{5}\). Both sides are positive and (\(\sqrt{2}+\sqrt{3}\)2=5+2\sqrt{6}>5). So the first side is larger.

Step 3

Exam Tip

दोनों पक्ष धनात्मक हैं और (\(\sqrt{2}+\sqrt{3}\)2=5+2\sqrt{6}>5) है। इसलिए पहला पक्ष बड़ा है।

Open Question Page
Ask Friends

कौन सा विकल्प (\(\sqrt{20}-\sqrt{5}\)2) का मान है?

Which option is the value of (\(\sqrt{20}-\sqrt{5}\)2)?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

\(\sqrt{20}=2\sqrt{5}\), so the bracket becomes \(\sqrt{5}\). Its square is (5).

Step 2

Why this answer is correct

The correct answer is A. (5). \(\sqrt{20}=2\sqrt{5}\), so the bracket becomes \(\sqrt{5}\). Its square is (5).

Step 3

Exam Tip

\(\sqrt{20}=2\sqrt{5}\), इसलिए कोष्ठक \(\sqrt{5}\) बनता है। उसका वर्ग (5) है।

Open Question Page
Ask Friends