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simplification MCQ Questions for Class 10

simplification se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

55 questions tagged with simplification.

Question 1/55 Expert Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 18

\(\sqrt{3}\) के प्रमाण में (p=3k) रखने के बाद \(9k^2=3q^2\) मिला। इसे सरल करने का सही तरीका क्या है?

In the proof for \(\sqrt{3}\), after putting (p=3k), \(9k^2=3q^2\) is obtained. What is the correct simplification?

Explanation opens after your attempt
Correct Answer

A. दोनों पक्षों को (3) से भाग देकर \(q^2=3k^2\) पानाDivide both sides by (3) to get \(q^2=3k^2\)

Step 1

Concept

In \(9k^2=3q^2\), the common factor is (3).

Step 2

Why this answer is correct

Dividing by (3) gives \(3k^2=q^2\), that is \(q^2=3k^2\).

Step 3

Exam Tip

Remove only valid common factors while simplifying. चरण 1: \(9k^2=3q^2\) में साझा गुणनखंड (3) है। चरण 2: (3) से भाग देने पर \(3k^2=q^2\), यानी \(q^2=3k^2\) मिलता है। चरण 3: सरलीकरण में केवल वैध समान गुणनखंड हटाएँ।

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Question 2/55 Expert Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 18

\(\sqrt{5}\) के प्रमाण में (a=5k) रखने पर \(25k^2=5b^2\) मिलता है। इससे \(b^2\) क्या होगा?

In the proof for \(\sqrt{5}\), putting (a=5k) gives \(25k^2=5b^2\). What will \(b^2\) be?

Explanation opens after your attempt
Correct Answer

B. \(5k^2\)

Step 1

Concept

Divide both sides of \(25k^2=5b^2\) by (5).

Step 2

Why this answer is correct

We get \(5k^2=b^2\), that is \(b^2=5k^2\).

Step 3

Exam Tip

This gives \(5\mid b^2\) and then \(5\mid b\). चरण 1: \(25k^2=5b^2\) में दोनों पक्षों को (5) से भाग दें। चरण 2: \(5k^2=b^2\), यानी \(b^2=5k^2\)। चरण 3: यही \(5\mid b^2\) और फिर \(5\mid b\) देता है।

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Question 3/55 Expert Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 17

\(\sqrt{5}\) की अपरिमेयता के प्रमाण में (x=5n) रखने के बाद \(25n^2=5y^2\) मिला। अगला सही सरलीकरण क्या है?

In the proof for \(\sqrt{5}\), after putting (x=5n), \(25n^2=5y^2\) is obtained. What is the next correct simplification?

Explanation opens after your attempt
Correct Answer

A. \(y^2=5n^2\)

Step 1

Concept

In \(25n^2=5y^2\), both sides can be divided by (5).

Step 2

Why this answer is correct

This gives \(5n^2=y^2\), that is \(y^2=5n^2\).

Step 3

Exam Tip

While simplifying, remove only the common factor, not the whole (25). चरण 1: \(25n^2=5y^2\) में दोनों पक्ष (5) से भाग दिए जा सकते हैं। चरण 2: इससे \(5n^2=y^2\), अर्थात \(y^2=5n^2\) मिलता है। चरण 3: सरलीकरण में (25) को पूरा नहीं हटाएँ, केवल समान गुणनखंड हटाएँ।

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Question 4/55 Expert Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 16

\(\sqrt{5}\) को परिमेय मानने पर \(p^2=5q^2\) मिलता है। यदि (p=5r), तो कौन-सा सरलीकरण सही है?

Assuming \(\sqrt{5}\) rational gives \(p^2=5q^2\). If (p=5r), which simplification is correct?

Explanation opens after your attempt
Correct Answer

A. \(q^2=5r^2\)

Step 1

Concept

Putting (p=5r) gives \(25r^2=5q^2\).

Step 2

Why this answer is correct

Dividing both sides by (5) gives \(q^2=5r^2\).

Step 3

Exam Tip

Reduce factors correctly during simplification. चरण 1: (p=5r) रखने पर \(25r^2=5q^2\) बनता है। चरण 2: दोनों पक्षों को (5) से भाग देने पर \(q^2=5r^2\) मिलता है। चरण 3: सरलीकरण में गुणक सही घटाएँ।

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Question 5/55 Hard Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 16

\(\sqrt{2}\) की सिद्धि में (p=2r) रखने पर \(p^2=2q^2\) से कौन सा सही सरलीकरण प्राप्त होता है?

In the proof of \(\sqrt{2}\), after putting (p=2r), which correct simplification is obtained from \(p^2=2q^2\)?

Explanation opens after your attempt
Correct Answer

A. \(q^2=2r^2\)

Step 1

Concept

If (p=2r), then \(p^2=4r^2\).

Step 2

Why this answer is correct

From \(4r^2=2q^2\), dividing both sides by (2) gives \(q^2=2r^2\).

Step 3

Exam Tip

This proves \(q^2\), and then (q), is even. चरण 1: (p=2r) रखने पर \(p^2=4r^2\) होगा। चरण 2: \(4r^2=2q^2\) से दोनों ओर (2) से भाग करने पर \(q^2=2r^2\) मिलता है। चरण 3: इससे \(q^2\) सम और फिर (q) सम सिद्ध होता है।

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Question 6/55 Medium Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 17

\(\sqrt{3}\) के प्रमाण में (p=3k) रखने के बाद \(9k^2=3q^2\) मिला। इससे \(q^2\) का सही रूप कौन सा है?

In the proof of \(\sqrt{3}\), after putting (p=3k), \(9k^2=3q^2\) is obtained. What is the correct form of \(q^2\)?

Explanation opens after your attempt
Correct Answer

A. \(q^2=3k^2\)

Step 1

Concept

Divide both sides of \(9k^2=3q^2\) by (3).

Step 2

Why this answer is correct

We get \(3k^2=q^2\), that is \(q^2=3k^2\).

Step 3

Exam Tip

This leads to (q) being divisible by (3). चरण 1: \(9k^2=3q^2\) के दोनों पक्षों को (3) से भाग दें। चरण 2: \(3k^2=q^2\), अर्थात \(q^2=3k^2\) मिलेगा। चरण 3: इसी से (q) के (3) से विभाज्य होने का रास्ता बनता है।

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Question 7/55 Easy Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 18

\(\sqrt{2}\) के प्रमाण में \(4k^2=2q^2\) से क्या मिलेगा?

In the proof of \(\sqrt{2}\), what follows from \(4k^2=2q^2\)?

Explanation opens after your attempt
Correct Answer

A. \(q^2=2k^2\)

Step 1

Concept

Divide both sides of \(4k^2=2q^2\) by (2).

Step 2

Why this answer is correct

We get \(2k^2=q^2\), that is \(q^2=2k^2\).

Step 3

Exam Tip

This indicates that (q) is even later. चरण 1: \(4k^2=2q^2\) के दोनों ओर (2) से भाग करें। चरण 2: \(2k^2=q^2\), यानी \(q^2=2k^2\) मिलेगा। चरण 3: यही आगे (q) के सम होने का संकेत देता है।

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Question 8/55 Easy Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 18

\(\sqrt{3}\) के प्रमाण में (p=3k) रखने के बाद \(9k^2=3q^2\) मिलता है। इससे क्या निकलेगा?

In the proof of \(\sqrt{3}\), after putting (p=3k), we get \(9k^2=3q^2\). What follows from this?

Explanation opens after your attempt
Correct Answer

A. \(q^2=3k^2\)

Step 1

Concept

Divide both sides of \(9k^2=3q^2\) by (3).

Step 2

Why this answer is correct

We get \(3k^2=q^2\), that is \(q^2=3k^2\).

Step 3

Exam Tip

This leads to (q) being divisible by (3). चरण 1: \(9k^2=3q^2\) के दोनों ओर (3) से भाग करें। चरण 2: \(3k^2=q^2\), यानी \(q^2=3k^2\) मिलेगा। चरण 3: इससे (q) के (3) से विभाज्य होने की राह खुलती है।

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Question 9/55 Easy Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 17

\(\sqrt{5}\) के प्रमाण में \(25k^2=5b^2\) से क्या सही निष्कर्ष मिलता है?

In the proof of \(\sqrt{5}\), what correct conclusion follows from \(25k^2=5b^2\)?

Explanation opens after your attempt
Correct Answer

A. \(b^2=5k^2\)

Step 1

Concept

Divide both sides of \(25k^2=5b^2\) by (5).

Step 2

Why this answer is correct

We get \(5k^2=b^2\), that is \(b^2=5k^2\).

Step 3

Exam Tip

This helps show that (b) is divisible by (5). चरण 1: \(25k^2=5b^2\) के दोनों ओर (5) से भाग करें। चरण 2: \(5k^2=b^2\), यानी \(b^2=5k^2\) मिलेगा। चरण 3: इससे (b) के (5) से विभाज्य होने की राह मिलती है।

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Question 10/55 Easy Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 17

\(\sqrt{2}\) के प्रमाण में (a=2k) रखने के बाद \(4k^2=2b^2\) से क्या मिलेगा?

In the proof of \(\sqrt{2}\), after putting (a=2k), what follows from \(4k^2=2b^2\)?

Explanation opens after your attempt
Correct Answer

A. \(b^2=2k^2\)

Step 1

Concept

Divide both sides of \(4k^2=2b^2\) by (2).

Step 2

Why this answer is correct

This gives \(2k^2=b^2\), that is \(b^2=2k^2\).

Step 3

Exam Tip

In such steps, divide both sides by the same number. चरण 1: \(4k^2=2b^2\) के दोनों ओर (2) से भाग करें। चरण 2: इससे \(2k^2=b^2\), अर्थात \(b^2=2k^2\) मिलता है। चरण 3: ऐसे चरण में दोनों ओर समान संख्या से भाग करें।

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Question 11/55 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(x=\sqrt{7}+\sqrt{28}\) है तो (x) का सही सरल रूप और प्रकार क्या है?

If \(x=\sqrt{7}+\sqrt{28}\), what is the correct simplified form and type of (x)?

Explanation opens after your attempt
Correct Answer

A. \(3\sqrt{7}\) और अपरिमेय\(3\sqrt{7}\) and irrational

Step 1

Concept

Since \(28=4\cdot 7\), \(\sqrt{28}=2\sqrt{7}\).

Step 2

Why this answer is correct

Now \(\sqrt{7}+2\sqrt{7}=3\sqrt{7}\), and \(\sqrt{7}\) is irrational.

Step 3

Exam Tip

In exams, combine like radicals by adding their coefficients. चरण 1: \(28=4\cdot 7\) इसलिए \(\sqrt{28}=2\sqrt{7}\)। चरण 2: अब \(\sqrt{7}+2\sqrt{7}=3\sqrt{7}\) और \(\sqrt{7}\) अपरिमेय है। चरण 3: परीक्षा में समान वर्गमूल वाले पदों को गुणांक जोड़कर सरल करें।

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Question 12/55 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा विकल्प \(\frac{\sqrt{45}}{3}\) का सही प्रकार बताता है?

Which option correctly describes \(\frac{\sqrt{45}}{3}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेय क्योंकि यह \(\sqrt{5}\) के बराबर हैIrrational because it equals \(\sqrt{5}\)

Step 1

Concept

\(\sqrt{45}=3\sqrt{5}\).

Step 2

Why this answer is correct

\(\frac{\sqrt{45}}{3}=\sqrt{5}\) which is irrational.

Step 3

Exam Tip

Even after division check the remaining radical. चरण 1: \(\sqrt{45}=3\sqrt{5}\)। चरण 2: \(\frac{\sqrt{45}}{3}=\sqrt{5}\) है जो अपरिमेय है। चरण 3: हर से भाग देने पर भी बचा हुआ वर्गमूल जांचना जरूरी है।

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Question 13/55 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सी संख्या निश्चित रूप से अपरिमेय है?

Which number is definitely irrational?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{2}+\sqrt{8}\)

Step 1

Concept

Simplify \(\sqrt{8}=2\sqrt{2}\).

Step 2

Why this answer is correct

\(\sqrt{2}+\sqrt{8}=3\sqrt{2}\) and \(\sqrt{2}\) is irrational.

Step 3

Exam Tip

Do not choose the answer before simplifying square roots. चरण 1: सरल करें \(\sqrt{8}=2\sqrt{2}\)। चरण 2: \(\sqrt{2}+\sqrt{8}=3\sqrt{2}\) है और \(\sqrt{2}\) अपरिमेय है। चरण 3: वर्गमूलों को सरल किए बिना उत्तर जल्दी न चुनें।

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Question 14/55 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

कौन-सा विकल्प \(\sqrt{2}+\sqrt{18}-\sqrt{50}+\sqrt{98}\) का सही सरल रूप है?

Which option is the correct simplified form of \(\sqrt{2}+\sqrt{18}-\sqrt{50}+\sqrt{98}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{18}=3\sqrt{2}\), \(\sqrt{50}=5\sqrt{2}\), and \(\sqrt{98}=7\sqrt{2}\).

Step 2

Why this answer is correct

\(1\sqrt{2}+3\sqrt{2}-5\sqrt{2}+7\sqrt{2}=6\sqrt{2}\).

Step 3

Exam Tip

In long surd expressions, write the coefficients separately and add them. चरण 1: \(\sqrt{18}=3\sqrt{2}\), \(\sqrt{50}=5\sqrt{2}\), और \(\sqrt{98}=7\sqrt{2}\)। चरण 2: \(1\sqrt{2}+3\sqrt{2}-5\sqrt{2}+7\sqrt{2}=6\sqrt{2}\)। चरण 3: लंबे मूल वाले प्रश्न में गुणांक अलग लिखकर जोड़ना आसान रहता है।

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Question 15/55 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

कौन-सा विकल्प \(\frac{\sqrt{75}-\sqrt{12}}{\sqrt{3}}\) का सही मान है?

Which option is the correct value of \(\frac{\sqrt{75}-\sqrt{12}}{\sqrt{3}}\)?

Explanation opens after your attempt
Correct Answer

A. (3)

Step 1

Concept

\(\sqrt{75}=5\sqrt{3}\) and \(\sqrt{12}=2\sqrt{3}\).

Step 2

Why this answer is correct

The numerator becomes \(3\sqrt{3}\), so division gives (3).

Step 3

Exam Tip

Subtract first, then divide by the denominator. चरण 1: \(\sqrt{75}=5\sqrt{3}\) और \(\sqrt{12}=2\sqrt{3}\) हैं। चरण 2: ऊपर का अंतर \(3\sqrt{3}\) है, इसलिए भाग देने पर (3) मिलता है। चरण 3: घटाव के बाद ही हर से भाग दें।

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Question 16/55 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

कौन-सा विकल्प \(\sqrt{18}+\sqrt{50}-\sqrt{8}\) का सही सरल रूप है?

Which option is the correct simplified form of \(\sqrt{18}+\sqrt{50}-\sqrt{8}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{18}=3\sqrt{2}\), \(\sqrt{50}=5\sqrt{2}\), and \(\sqrt{8}=2\sqrt{2}\).

Step 2

Why this answer is correct

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

Step 3

Exam Tip

Keep the signs carefully while adding or subtracting coefficients. चरण 1: \(\sqrt{18}=3\sqrt{2}\), \(\sqrt{50}=5\sqrt{2}\), और \(\sqrt{8}=2\sqrt{2}\)। चरण 2: \(3\sqrt{2}+5\sqrt{2}-2\sqrt{2}=6\sqrt{2}\)। चरण 3: चिह्नों को ध्यान से रखकर गुणांक जोड़ें या घटाएँ।

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Question 17/55 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

कौन-सा विकल्प \(\sqrt{2}+\sqrt{8}+\sqrt{18}+\sqrt{32}\) का सही सरल रूप है?

Which option is the correct simplified form of \(\sqrt{2}+\sqrt{8}+\sqrt{18}+\sqrt{32}\)?

Explanation opens after your attempt
Correct Answer

A. \(10\sqrt{2}\)

Step 1

Concept

\(\sqrt{8}=2\sqrt{2}\), \(\sqrt{18}=3\sqrt{2}\), and \(\sqrt{32}=4\sqrt{2}\).

Step 2

Why this answer is correct

The total is \(1\sqrt{2}+2\sqrt{2}+3\sqrt{2}+4\sqrt{2}=10\sqrt{2}\).

Step 3

Exam Tip

In ordered surds, identify the coefficient pattern. चरण 1: \(\sqrt{8}=2\sqrt{2}\), \(\sqrt{18}=3\sqrt{2}\), और \(\sqrt{32}=4\sqrt{2}\)। चरण 2: कुल योग \(1\sqrt{2}+2\sqrt{2}+3\sqrt{2}+4\sqrt{2}=10\sqrt{2}\) है। चरण 3: क्रमबद्ध मूलों में गुणांक का पैटर्न पहचानें।

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Question 18/55 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

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।

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Question 19/55 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

कौन-सा विकल्प \(\frac{\sqrt{45}+\sqrt{20}}{\sqrt{5}}\) का सही मान देता है?

Which option gives the correct value of \(\frac{\sqrt{45}+\sqrt{20}}{\sqrt{5}}\)?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

\(\sqrt{45}=3\sqrt{5}\) and \(\sqrt{20}=2\sqrt{5}\).

Step 2

Why this answer is correct

The numerator becomes \(5\sqrt{5}\), so \(\frac{5\sqrt{5}}{\sqrt{5}}=5\).

Step 3

Exam Tip

Before division, convert the numerator surds into like terms. चरण 1: \(\sqrt{45}=3\sqrt{5}\) और \(\sqrt{20}=2\sqrt{5}\) हैं। चरण 2: ऊपर का योग \(5\sqrt{5}\) है, इसलिए \(\frac{5\sqrt{5}}{\sqrt{5}}=5\)। चरण 3: भाग से पहले ऊपर के मूलों को समान रूप में बदलें।

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Question 20/55 Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(x=\sqrt{6}+\sqrt{24}\), तो (x) किसके बराबर है?

If \(x=\sqrt{6}+\sqrt{24}\), what is (x) equal to?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{24}=2\sqrt{6}\).

Step 2

Why this answer is correct

So \(x=\sqrt{6}+2\sqrt{6}=3\sqrt{6}\), which is irrational.

Step 3

Exam Tip

Simplify radicals to like terms before adding. चरण 1: \(\sqrt{24}=2\sqrt{6}\) है। चरण 2: इसलिए \(x=\sqrt{6}+2\sqrt{6}=3\sqrt{6}\), जो अपरिमेय है। चरण 3: मूल को सरल करके समान पद बनाएँ, फिर जोड़ें।

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Question 21/55 Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(x=\sqrt{5}+\sqrt{20}\), तो \(x^2\) का मान क्या है?

If \(x=\sqrt{5}+\sqrt{20}\), what is the value of \(x^2\)?

Explanation opens after your attempt
Correct Answer

B. (45)

Step 1

Concept

\(\sqrt{20}=2\sqrt{5}\), so \(x=3\sqrt{5}\).

Step 2

Why this answer is correct

(x-2=\(3\sqrt{5}\)2=9\times5=45).

Step 3

Exam Tip

Simplify surd terms before squaring. चरण 1: \(\sqrt{20}=2\sqrt{5}\), इसलिए \(x=3\sqrt{5}\)। चरण 2: (x-2=\(3\sqrt{5}\)2=9\times5=45)। चरण 3: वर्ग करने से पहले मूल वाले पदों को सरल करें।

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Question 22/55 Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

यदि \(x=4+\sqrt{6}\), तो (x-4) की प्रकृति क्या होगी?

If \(x=4+\sqrt{6}\), what will be the nature of (x-4)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

(x-4=\(4+\sqrt{6}\)-4).

Step 2

Why this answer is correct

On simplifying, \(x-4=\sqrt{6}\), and since (6) is not a perfect square, \(\sqrt{6}\) is irrational.

Step 3

Exam Tip

When rational terms cancel, check the nature of the remaining radical. चरण 1: (x-4=\(4+\sqrt{6}\)-4) है। चरण 2: सरल करने पर \(x-4=\sqrt{6}\), और (6) पूर्ण वर्ग नहीं है, इसलिए \(\sqrt{6}\) अपरिमेय है। चरण 3: व्यंजक में परिमेय पद कट जाए तो बचे हुए मूल की प्रकृति देखें।

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Question 23/55 Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

यदि \(a=\sqrt{2}+\sqrt{8}\), तो (a) किस प्रकार की संख्या है?

If \(a=\sqrt{2}+\sqrt{8}\), what type of number is (a)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

\(\sqrt{8}=2\sqrt{2}\).

Step 2

Why this answer is correct

So \(a=\sqrt{2}+2\sqrt{2}=3\sqrt{2}\), and \(\sqrt{2}\) is irrational.

Step 3

Exam Tip

Simplify like radical terms before deciding the type of number. चरण 1: \(\sqrt{8}=2\sqrt{2}\) होता है। चरण 2: इसलिए \(a=\sqrt{2}+2\sqrt{2}=3\sqrt{2}\), और \(\sqrt{2}\) अपरिमेय है। चरण 3: समान मूल वाले पदों को पहले सरल करें।

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Question 24/55 Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

\(\sqrt{242}+\sqrt{98}-\sqrt{32}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{242}+\sqrt{98}-\sqrt{32}\)?

Explanation opens after your attempt
Correct Answer

A. \(14\sqrt{2}\)

Step 1

Concept

\(\sqrt{242}=11\sqrt{2}\), \(\sqrt{98}=7\sqrt{2}\), and \(\sqrt{32}=4\sqrt{2}\).

Step 2

Why this answer is correct

\(11\sqrt{2}+7\sqrt{2}-4\sqrt{2}=14\sqrt{2}\).

Step 3

Exam Tip

Convert all radicals into like form before adding or subtracting. चरण 1: \(\sqrt{242}=11\sqrt{2}\), \(\sqrt{98}=7\sqrt{2}\), और \(\sqrt{32}=4\sqrt{2}\)। चरण 2: \(11\sqrt{2}+7\sqrt{2}-4\sqrt{2}=14\sqrt{2}\)। चरण 3: सभी वर्गमूलों को समान रूप में बदलकर ही जोड़-घटाव करें।

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Question 25/55 Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

\(\sqrt{245}+\sqrt{180}-\sqrt{80}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{245}+\sqrt{180}-\sqrt{80}\)?

Explanation opens after your attempt
Correct Answer

C. \(9\sqrt{5}\)

Step 1

Concept

\(\sqrt{245}=7\sqrt{5}\), \(\sqrt{180}=6\sqrt{5}\), and \(\sqrt{80}=4\sqrt{5}\).

Step 2

Why this answer is correct

\(7\sqrt{5}+6\sqrt{5}-4\sqrt{5}=9\sqrt{5}\).

Step 3

Exam Tip

Before addition or subtraction, write all radicals in like form. चरण 1: \(\sqrt{245}=7\sqrt{5}\), \(\sqrt{180}=6\sqrt{5}\), और \(\sqrt{80}=4\sqrt{5}\)। चरण 2: \(7\sqrt{5}+6\sqrt{5}-4\sqrt{5}=9\sqrt{5}\)। चरण 3: जोड़-घटाव से पहले सभी वर्गमूलों को समान रूप में लिखें।

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Question 26/55 Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

\(\frac{9}{\sqrt{9}}\) का सरल रूप क्या है?

What is the simplified form of \(\frac{9}{\sqrt{9}}\)?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

First write \(\sqrt{9}=3\).

Step 2

Why this answer is correct

\(\frac{9}{\sqrt{9}}=\frac{9}{3}=3\).

Step 3

Exam Tip

Rationalisation is not always needed; first evaluate square roots of perfect squares. चरण 1: पहले \(\sqrt{9}=3\) लिखें। चरण 2: \(\frac{9}{\sqrt{9}}=\frac{9}{3}=3\)। चरण 3: हर बार परिमेयकरण जरूरी नहीं, पूर्ण वर्ग का वर्गमूल सीधे निकालें।

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Question 27/55 Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

\(\sqrt{28}+\sqrt{63}+\sqrt{175}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{28}+\sqrt{63}+\sqrt{175}\)?

Explanation opens after your attempt
Correct Answer

B. \(10\sqrt{7}\)

Step 1

Concept

\(\sqrt{28}=2\sqrt{7}\), \(\sqrt{63}=3\sqrt{7}\), and \(\sqrt{175}=5\sqrt{7}\).

Step 2

Why this answer is correct

The sum is \(2\sqrt{7}+3\sqrt{7}+5\sqrt{7}=10\sqrt{7}\).

Step 3

Exam Tip

Once radicals become like terms, add only the coefficients. चरण 1: \(\sqrt{28}=2\sqrt{7}\), \(\sqrt{63}=3\sqrt{7}\), और \(\sqrt{175}=5\sqrt{7}\)। चरण 2: योग \(2\sqrt{7}+3\sqrt{7}+5\sqrt{7}=10\sqrt{7}\) है। चरण 3: समान वर्गमूल बनने पर केवल गुणांक जोड़ें।

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Question 28/55 Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

\(\sqrt{147}-\sqrt{75}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{147}-\sqrt{75}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{147}=7\sqrt{3}\) and \(\sqrt{75}=5\sqrt{3}\).

Step 2

Why this answer is correct

\(7\sqrt{3}-5\sqrt{3}=2\sqrt{3}\).

Step 3

Exam Tip

Before subtracting radicals, convert them into like radicals. चरण 1: \(\sqrt{147}=7\sqrt{3}\) और \(\sqrt{75}=5\sqrt{3}\)। चरण 2: \(7\sqrt{3}-5\sqrt{3}=2\sqrt{3}\)। चरण 3: वर्गमूलों को घटाने से पहले समान वर्गमूल में बदलना जरूरी है।

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Question 29/55 Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

\(\sqrt{128}+\sqrt{72}-\sqrt{50}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{128}+\sqrt{72}-\sqrt{50}\)?

Explanation opens after your attempt
Correct Answer

A. \(9\sqrt{2}\)

Step 1

Concept

\(\sqrt{128}=8\sqrt{2}\), \(\sqrt{72}=6\sqrt{2}\), and \(\sqrt{50}=5\sqrt{2}\).

Step 2

Why this answer is correct

\(8\sqrt{2}+6\sqrt{2}-5\sqrt{2}=9\sqrt{2}\).

Step 3

Exam Tip

Convert all radicals into like form before adding or subtracting. चरण 1: \(\sqrt{128}=8\sqrt{2}\), \(\sqrt{72}=6\sqrt{2}\), और \(\sqrt{50}=5\sqrt{2}\)। चरण 2: \(8\sqrt{2}+6\sqrt{2}-5\sqrt{2}=9\sqrt{2}\)। चरण 3: सभी वर्गमूलों को समान रूप में बदलकर ही जोड़-घटाव करें।

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Question 30/55 Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

\(\sqrt{75}+\sqrt{300}-\sqrt{48}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{75}+\sqrt{300}-\sqrt{48}\)?

Explanation opens after your attempt
Correct Answer

B. \(11\sqrt{3}\)

Step 1

Concept

\(\sqrt{75}=5\sqrt{3}\), \(\sqrt{300}=10\sqrt{3}\), and \(\sqrt{48}=4\sqrt{3}\).

Step 2

Why this answer is correct

\(5\sqrt{3}+10\sqrt{3}-4\sqrt{3}=11\sqrt{3}\).

Step 3

Exam Tip

Simplify all radicals before addition and subtraction. चरण 1: \(\sqrt{75}=5\sqrt{3}\), \(\sqrt{300}=10\sqrt{3}\), और \(\sqrt{48}=4\sqrt{3}\)। चरण 2: \(5\sqrt{3}+10\sqrt{3}-4\sqrt{3}=11\sqrt{3}\)। चरण 3: जोड़ और घटाव से पहले सभी वर्गमूलों को सरल करें।

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