Class 9 Mathematics - Number Systems - Square root spiral Medium Quiz

Level 18 • 50/50 questions • 35 seconds per question.

Level readiness 50/50 Questions
Time Left 29:10 35 sec/question
RewardsCoins + XP
ModeClassic Quiz
Share
Question 1 / 50 0 score
Answered 0/50 Correct 0 Time 29:10

मान लें \(\sqrt{2}=\frac{a}{b}\) सरलतम रूप में है। वर्ग करने के बाद कौन-सा संबंध सही बनता है?

Suppose \(\sqrt{2}=\frac{a}{b}\) is in lowest form. Which relation is correct after squaring?

Explanation opens after your attempt
Correct Answer

C. \(a^2=2b^2\)

Step 1

Concept

Squaring gives \(2=\frac{a^2}{b^2}\). Therefore \(a^2=2b^2\) is the correct relation.

Step 2

Why this answer is correct

The correct answer is C. \(a^2=2b^2\). Squaring gives \(2=\frac{a^2}{b^2}\). Therefore \(a^2=2b^2\) is the correct relation.

Step 3

Exam Tip

वर्ग करने पर \(2=\frac{a^2}{b^2}\) मिलता है। इसलिए \(a^2=2b^2\) सही संबंध है।

Open Question Page
Ask Friends

मान लें \(\sqrt{3}=\frac{p}{q}\) सरलतम रूप में है। वर्ग करने पर कौन-सा समीकरण मिलता है?

Suppose \(\sqrt{3}=\frac{p}{q}\) is in lowest form. Which equation is obtained after squaring?

Explanation opens after your attempt
Correct Answer

B. \(p^2=3q^2\)

Step 1

Concept

Squaring gives \(3=\frac{p^2}{q^2}\). Therefore \(p^2=3q^2\) is obtained.

Step 2

Why this answer is correct

The correct answer is B. \(p^2=3q^2\). Squaring gives \(3=\frac{p^2}{q^2}\). Therefore \(p^2=3q^2\) is obtained.

Step 3

Exam Tip

वर्ग करने पर \(3=\frac{p^2}{q^2}\) होता है। इसलिए \(p^2=3q^2\) मिलता है।

Open Question Page
Ask Friends

\(\sqrt{2}\) के प्रमाण में \(a^2=2b^2\) मिलने के बाद (a) के बारे में सही तर्क क्या है?

In the proof of \(\sqrt{2}\), after getting \(a^2=2b^2\), what is the correct reasoning about (a)?

Explanation opens after your attempt
Correct Answer

B. (a) सम है क्योंकि \(a^2\) सम है(a) is even because \(a^2\) is even

Step 1

Concept

The right side has (2), so \(a^2\) is even. If a square is even, the number is also even.

Step 2

Why this answer is correct

The correct answer is B. (a) सम है क्योंकि \(a^2\) सम है / (a) is even because \(a^2\) is even. The right side has (2), so \(a^2\) is even. If a square is even, the number is also even.

Step 3

Exam Tip

दाएँ पक्ष में (2) है इसलिए \(a^2\) सम है। वर्ग सम हो तो संख्या भी सम होती है।

Open Question Page
Ask Friends

\(\sqrt{3}\) के प्रमाण में \(p^2=3q^2\) से (p) के लिए कौन-सा निष्कर्ष निकलता है?

In the proof of \(\sqrt{3}\), what conclusion follows for (p) from \(p^2=3q^2\)?

Explanation opens after your attempt
Correct Answer

C. (p) (3) से विभाज्य है(p) is divisible by (3)

Step 1

Concept

\(p^2\) has factor (3), so (p) is also divisible by (3). Use the prime factor rule.

Step 2

Why this answer is correct

The correct answer is C. (p) (3) से विभाज्य है / (p) is divisible by (3). \(p^2\) has factor (3), so (p) is also divisible by (3). Use the prime factor rule.

Step 3

Exam Tip

\(p^2\) में (3) का गुणनखंड है इसलिए (p) भी (3) से विभाज्य होगा। अभाज्य गुणनखंड का नियम लगाएं।

Open Question Page
Ask Friends

यदि \(\sqrt{2}\) के प्रमाण में (a=2r) रखा जाए तो \(a^2=2b^2\) से आगे क्या मिलेगा?

If (a=2r) is taken in the proof of \(\sqrt{2}\), what follows from \(a^2=2b^2\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

Putting (a=2r) gives \(4r^2=2b^2\). Simplifying gives \(b^2=2r^2\).

Step 2

Why this answer is correct

The correct answer is A. \(b^2=2r^2\). Putting (a=2r) gives \(4r^2=2b^2\). Simplifying gives \(b^2=2r^2\).

Step 3

Exam Tip

(a=2r) रखने पर \(4r^2=2b^2\) मिलता है। सरल करने पर \(b^2=2r^2\) बनता है।

Open Question Page
Ask Friends

यदि \(\sqrt{3}\) के प्रमाण में (p=3k) हो तो \(p^2=3q^2\) से कौन-सा संबंध बनेगा?

If (p=3k) in the proof of \(\sqrt{3}\), which relation follows from \(p^2=3q^2\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

Putting (p=3k) gives \(9k^2=3q^2\). Therefore \(q^2=3k^2\) is obtained.

Step 2

Why this answer is correct

The correct answer is B. \(q^2=3k^2\). Putting (p=3k) gives \(9k^2=3q^2\). Therefore \(q^2=3k^2\) is obtained.

Step 3

Exam Tip

(p=3k) रखने पर \(9k^2=3q^2\) बनता है। इसलिए \(q^2=3k^2\) मिलता है।

Open Question Page
Ask Friends

\(\sqrt{2}\) के प्रमाण में \(b^2=2r^2\) मिलने पर (b) के बारे में क्या सही है?

In the proof of \(\sqrt{2}\), after getting \(b^2=2r^2\), what is true about (b)?

Explanation opens after your attempt
Correct Answer

C. (b) सम है(b) is even

Step 1

Concept

\(b^2\) is even, so (b) is also even. This makes both numbers even and gives contradiction.

Step 2

Why this answer is correct

The correct answer is C. (b) सम है / (b) is even. \(b^2\) is even, so (b) is also even. This makes both numbers even and gives contradiction.

Step 3

Exam Tip

\(b^2\) सम है इसलिए (b) भी सम होगा। यही दोनों को सम बनाकर विरोधाभास देता है।

Open Question Page
Ask Friends

\(\sqrt{3}\) के प्रमाण में \(q^2=3k^2\) मिलने पर (q) के बारे में कौन-सा निष्कर्ष सही है?

In the proof of \(\sqrt{3}\), after getting \(q^2=3k^2\), which conclusion about (q) is correct?

Explanation opens after your attempt
Correct Answer

D. (q) (3) से विभाज्य है(q) is divisible by (3)

Step 1

Concept

\(q^2\) is divisible by (3), so (q) is also divisible by (3). This leads to the final contradiction.

Step 2

Why this answer is correct

The correct answer is D. (q) (3) से विभाज्य है / (q) is divisible by (3). \(q^2\) is divisible by (3), so (q) is also divisible by (3). This leads to the final contradiction.

Step 3

Exam Tip

\(q^2\) (3) से विभाज्य है इसलिए (q) भी (3) से विभाज्य होगा। यह अंतिम विरोधाभास की ओर ले जाता है।

Open Question Page
Ask Friends

\(\sqrt{3}\) के प्रमाण में अंतिम विरोधाभास किस रूप में आता है?

In what form does the final contradiction appear in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

B. (p) और (q) दोनों (3) से विभाज्य हैं जबकि वे सहभाज्य माने गए थेBoth (p) and (q) are divisible by (3) though assumed coprime

Step 1

Concept

Both being divisible by (3) gives common factor (3). This contradicts the lowest form.

Step 2

Why this answer is correct

The correct answer is B. (p) और (q) दोनों (3) से विभाज्य हैं जबकि वे सहभाज्य माने गए थे / Both (p) and (q) are divisible by (3) though assumed coprime. Both being divisible by (3) gives common factor (3). This contradicts the lowest form.

Step 3

Exam Tip

दोनों का (3) से विभाज्य होना सामान्य गुणनखंड (3) देता है। यह सरलतम रूप से विरोधाभास है।

Open Question Page
Ask Friends

यदि \(\frac{a}{b}\) सरलतम रूप में है तो कौन-सी स्थिति असंभव है?

If \(\frac{a}{b}\) is in lowest form, which situation is impossible?

Explanation opens after your attempt
Correct Answer

C. (a) और (b) दोनों सम हैंBoth (a) and (b) are even

Step 1

Concept

In lowest form, there should be no common factor except (1). If both are even, (2) is common.

Step 2

Why this answer is correct

The correct answer is C. (a) और (b) दोनों सम हैं / Both (a) and (b) are even. In lowest form, there should be no common factor except (1). If both are even, (2) is common.

Step 3

Exam Tip

सरलतम रूप में सामान्य गुणनखंड (1) के अलावा नहीं होना चाहिए। दोनों सम हों तो (2) सामान्य होता है।

Open Question Page
Ask Friends

यदि \(\frac{p}{q}\) सरलतम रूप में है तो कौन-सी स्थिति \(\sqrt{3}\) के प्रमाण में विरोधाभास बनाती है?

If \(\frac{p}{q}\) is in lowest form, which situation creates contradiction in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

D. (p) और (q) दोनों (3) से विभाज्य हैंBoth (p) and (q) are divisible by (3)

Step 1

Concept

If both are divisible by (3), common factor (3) appears. This breaks the coprime condition.

Step 2

Why this answer is correct

The correct answer is D. (p) और (q) दोनों (3) से विभाज्य हैं / Both (p) and (q) are divisible by (3). If both are divisible by (3), common factor (3) appears. This breaks the coprime condition.

Step 3

Exam Tip

दोनों (3) से विभाज्य हों तो (3) सामान्य गुणनखंड बन जाता है। यह सहभाज्य शर्त को तोड़ता है।

Open Question Page
Ask Friends

किस विकल्प में \(\sqrt{2}\) की अपरिमेयता के प्रमाण का सही क्रम है?

Which option gives the correct order in the proof of irrationality of \(\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

A. परिमेय मानना फिर वर्ग करना फिर दोनों सम का विरोधाभासAssume rational then square then contradiction of both even

Step 1

Concept

In contradiction method, rationality is assumed first. Then squaring gives the contradiction that both are even.

Step 2

Why this answer is correct

The correct answer is A. परिमेय मानना फिर वर्ग करना फिर दोनों सम का विरोधाभास / Assume rational then square then contradiction of both even. In contradiction method, rationality is assumed first. Then squaring gives the contradiction that both are even.

Step 3

Exam Tip

विरोधाभास विधि में पहले परिमेय मानते हैं। फिर वर्ग करके दोनों सम होने का विरोधाभास मिलता है।

Open Question Page
Ask Friends

किस विकल्प में \(\sqrt{3}\) की अपरिमेयता के प्रमाण का सही क्रम है?

Which option gives the correct order in the proof of irrationality of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

B. परिमेय मानना फिर वर्ग करना फिर दोनों (3) से विभाज्य होने का विरोधाभासAssume rational then square then contradiction of both divisible by (3)

Step 1

Concept

For \(\sqrt{3}\), we first assume rationality and square. Then divisibility by (3) conflicts with coprime condition.

Step 2

Why this answer is correct

The correct answer is B. परिमेय मानना फिर वर्ग करना फिर दोनों (3) से विभाज्य होने का विरोधाभास / Assume rational then square then contradiction of both divisible by (3). For \(\sqrt{3}\), we first assume rationality and square. Then divisibility by (3) conflicts with coprime condition.

Step 3

Exam Tip

\(\sqrt{3}\) में पहले परिमेय मानकर वर्ग करते हैं। फिर (3) से विभाज्यता सहभाज्य शर्त से टकराती है।

Open Question Page
Ask Friends

\(\sqrt{2}\) के प्रमाण में \(m^2=2n^2\) से सीधे (n) सम लिखना क्यों अधूरा है?

In the proof of \(\sqrt{2}\), why is it incomplete to write directly from \(m^2=2n^2\) that (n) is even?

Explanation opens after your attempt
Correct Answer

A. पहले (m) सम सिद्ध करके (m=2r) रखना पड़ता हैFirst (m) must be proved even and (m=2r) must be used

Step 1

Concept

From \(m^2=2n^2\), (m) is proved even first. Only after putting (m=2r), \(n^2=2r^2\) is obtained.

Step 2

Why this answer is correct

The correct answer is A. पहले (m) सम सिद्ध करके (m=2r) रखना पड़ता है / First (m) must be proved even and (m=2r) must be used. From \(m^2=2n^2\), (m) is proved even first. Only after putting (m=2r), \(n^2=2r^2\) is obtained.

Step 3

Exam Tip

\(m^2=2n^2\) से पहले (m) सम मिलता है। (m=2r) रखने पर ही \(n^2=2r^2\) बनता है।

Open Question Page
Ask Friends

\(\sqrt{3}\) के प्रमाण में \(p^2=3q^2\) से सीधे (q) (3) से विभाज्य लिखना क्यों अधूरा है?

In the proof of \(\sqrt{3}\), why is it incomplete to write directly from \(p^2=3q^2\) that (q) is divisible by (3)?

Explanation opens after your attempt
Correct Answer

B. पहले (p) (3) से विभाज्य सिद्ध करके (p=3k) रखना पड़ता हैFirst (p) must be proved divisible by (3) and (p=3k) must be used

Step 1

Concept

First (p) is proved divisible by (3) from \(p^2\). Then after putting (p=3k), the conclusion for (q) follows.

Step 2

Why this answer is correct

The correct answer is B. पहले (p) (3) से विभाज्य सिद्ध करके (p=3k) रखना पड़ता है / First (p) must be proved divisible by (3) and (p=3k) must be used. First (p) is proved divisible by (3) from \(p^2\). Then after putting (p=3k), the conclusion for (q) follows.

Step 3

Exam Tip

पहले \(p^2\) से (p) का (3) से विभाज्य होना सिद्ध होता है। फिर (p=3k) रखने पर (q) के लिए निष्कर्ष आता है।

Open Question Page
Ask Friends

किस कथन का उपयोग \(\sqrt{2}\) के प्रमाण में \(a^2\) से (a) तक जाने के लिए होता है?

Which statement is used to move from \(a^2\) to (a) in the proof of \(\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

C. यदि \(a^2\) सम है तो (a) सम हैIf \(a^2\) is even then (a) is even

Step 1

Concept

This is the key parity rule. It allows writing (a=2r).

Step 2

Why this answer is correct

The correct answer is C. यदि \(a^2\) सम है तो (a) सम है / If \(a^2\) is even then (a) is even. This is the key parity rule. It allows writing (a=2r).

Step 3

Exam Tip

यह समता का मुख्य नियम है। इसी से (a=2r) लिखा जा सकता है।

Open Question Page
Ask Friends

किस कथन का उपयोग \(\sqrt{3}\) के प्रमाण में \(p^2\) से (p) तक जाने के लिए होता है?

Which statement is used to move from \(p^2\) to (p) in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

D. यदि \(p^2\) (3) से विभाज्य है तो (p) (3) से विभाज्य हैIf \(p^2\) is divisible by (3), then (p) is divisible by (3)

Step 1

Concept

Prime factor (3) appears in the square only when the number has factor (3). This is the key rule of the proof.

Step 2

Why this answer is correct

The correct answer is D. यदि \(p^2\) (3) से विभाज्य है तो (p) (3) से विभाज्य है / If \(p^2\) is divisible by (3), then (p) is divisible by (3). Prime factor (3) appears in the square only when the number has factor (3). This is the key rule of the proof.

Step 3

Exam Tip

अभाज्य गुणनखंड (3) वर्ग में तभी आता है जब संख्या में (3) हो। यही प्रमाण का मुख्य नियम है।

Open Question Page
Ask Friends

\(\sqrt{2}=\frac{m}{n}\) में \(n\neq0\) क्यों जरूरी है?

Why is \(n\neq0\) necessary in \(\sqrt{2}=\frac{m}{n}\)?

Explanation opens after your attempt
Correct Answer

A. क्योंकि शून्य से भाग परिभाषित नहीं हैBecause division by zero is not defined

Step 1

Concept

The denominator of a fraction cannot be zero. Therefore \(n\neq0\) is necessary in rational form.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि शून्य से भाग परिभाषित नहीं है / Because division by zero is not defined. The denominator of a fraction cannot be zero. Therefore \(n\neq0\) is necessary in rational form.

Step 3

Exam Tip

भिन्न में हर शून्य नहीं हो सकता। इसलिए परिमेय रूप में \(n\neq0\) आवश्यक है।

Open Question Page
Ask Friends

\(\sqrt{3}=\frac{p}{q}\) में (p,q) को सहभाज्य क्यों चुना जाता है?

Why are (p,q) chosen coprime in \(\sqrt{3}=\frac{p}{q}\)?

Explanation opens after your attempt
Correct Answer

B. क्योंकि परिमेय संख्या को सरलतम भिन्न में लिखा जाता हैBecause a rational number is written in lowest fraction

Step 1

Concept

In lowest fraction, numerator and denominator are coprime. This helps show contradiction later.

Step 2

Why this answer is correct

The correct answer is B. क्योंकि परिमेय संख्या को सरलतम भिन्न में लिखा जाता है / Because a rational number is written in lowest fraction. In lowest fraction, numerator and denominator are coprime. This helps show contradiction later.

Step 3

Exam Tip

सरलतम भिन्न में अंश और हर सहभाज्य होते हैं। यही बाद में विरोधाभास दिखाने में काम आता है।

Open Question Page
Ask Friends

यदि (p) और (q) सहभाज्य हैं तो कौन-सी स्थिति \(\sqrt{3}\) के प्रमाण में असंभव है?

If (p) and (q) are coprime, which situation is impossible in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

D. दोनों में सामान्य गुणनखंड (3) हैBoth have common factor (3)

Step 1

Concept

Coprime numbers have no common factor except (1). Having common factor (3) is a contradiction.

Step 2

Why this answer is correct

The correct answer is D. दोनों में सामान्य गुणनखंड (3) है / Both have common factor (3). Coprime numbers have no common factor except (1). Having common factor (3) is a contradiction.

Step 3

Exam Tip

सहभाज्य संख्याओं में (1) के अलावा कोई सामान्य गुणनखंड नहीं होता। (3) सामान्य होना विरोधाभास है।

Open Question Page
Ask Friends

\(\sqrt{2}\) के प्रमाण में यदि (m) विषम हो तो \(m^2=2n^2\) से क्या टकराव होगा?

In the proof of \(\sqrt{2}\), if (m) is odd, what conflict occurs with \(m^2=2n^2\)?

Explanation opens after your attempt
Correct Answer

A. \(m^2\) विषम होना चाहिए पर समीकरण से सम मिलता है\(m^2\) should be odd but the equation gives even

Step 1

Concept

The square of an odd number is odd. But \(m^2=2n^2\) shows \(m^2\) is even.

Step 2

Why this answer is correct

The correct answer is A. \(m^2\) विषम होना चाहिए पर समीकरण से सम मिलता है / \(m^2\) should be odd but the equation gives even. The square of an odd number is odd. But \(m^2=2n^2\) shows \(m^2\) is even.

Step 3

Exam Tip

विषम संख्या का वर्ग विषम होता है। लेकिन \(m^2=2n^2\) \(m^2\) को सम दिखाता है।

Open Question Page
Ask Friends

\(\sqrt{3}\) के प्रमाण में यदि (p) (3) से विभाज्य न हो तो \(p^2=3q^2\) से क्या टकराव होगा?

In the proof of \(\sqrt{3}\), if (p) is not divisible by (3), what conflict occurs with \(p^2=3q^2\)?

Explanation opens after your attempt
Correct Answer

B. \(p^2\) (3) से विभाज्य नहीं होना चाहिए पर समीकरण से विभाज्य मिलता है\(p^2\) should not be divisible by (3) but the equation gives divisible

Step 1

Concept

If (p) has no factor (3), then \(p^2\) also has none. But the equation shows \(p^2\) divisible by (3).

Step 2

Why this answer is correct

The correct answer is B. \(p^2\) (3) से विभाज्य नहीं होना चाहिए पर समीकरण से विभाज्य मिलता है / \(p^2\) should not be divisible by (3) but the equation gives divisible. If (p) has no factor (3), then \(p^2\) also has none. But the equation shows \(p^2\) divisible by (3).

Step 3

Exam Tip

यदि (p) में (3) का गुणनखंड नहीं है तो \(p^2\) में भी नहीं होगा। लेकिन समीकरण \(p^2\) को (3) से विभाज्य बताता है।

Open Question Page
Ask Friends

\(\sqrt{2}\) का प्रमाण दशमलव विस्तार के बिना क्यों मान्य है?

Why is the proof of \(\sqrt{2}\) valid without decimal expansion?

Explanation opens after your attempt
Correct Answer

C. क्योंकि प्रमाण समता और सहभाज्य विरोधाभास पर आधारित हैBecause the proof is based on evenness and coprime contradiction

Step 1

Concept

The proof does not require decimals. Evenness and the lowest fraction condition are enough.

Step 2

Why this answer is correct

The correct answer is C. क्योंकि प्रमाण समता और सहभाज्य विरोधाभास पर आधारित है / Because the proof is based on evenness and coprime contradiction. The proof does not require decimals. Evenness and the lowest fraction condition are enough.

Step 3

Exam Tip

प्रमाण में दशमलव की आवश्यकता नहीं होती। समता और सरलतम भिन्न की शर्त पर्याप्त हैं।

Open Question Page
Ask Friends

\(\sqrt{3}\) को दशमलव अनुमान से अपरिमेय सिद्ध करना क्यों उचित नहीं है?

Why is proving \(\sqrt{3}\) irrational by decimal approximation not suitable?

Explanation opens after your attempt
Correct Answer

D. क्योंकि अनुमान पूर्ण प्रमाण नहीं देताBecause approximation does not give a complete proof

Step 1

Concept

Decimal approximation only gives a nearby value. A proof needs divisibility and contradiction.

Step 2

Why this answer is correct

The correct answer is D. क्योंकि अनुमान पूर्ण प्रमाण नहीं देता / Because approximation does not give a complete proof. Decimal approximation only gives a nearby value. A proof needs divisibility and contradiction.

Step 3

Exam Tip

दशमलव अनुमान केवल पास का मान देता है। प्रमाण के लिए विभाज्यता और विरोधाभास चाहिए।

Open Question Page
Ask Friends

\(\sqrt{2}\) और \(\sqrt{3}\) के प्रमाणों का संयुक्त निष्कर्ष क्या है?

What is the combined conclusion of the proofs of \(\sqrt{2}\) and \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

D. दोनों अपरिमेय हैंBoth are irrational

Step 1

Concept

Assuming either rational gives a contradiction with the coprime condition. Therefore both are irrational.

Step 2

Why this answer is correct

The correct answer is D. दोनों अपरिमेय हैं / Both are irrational. Assuming either rational gives a contradiction with the coprime condition. Therefore both are irrational.

Step 3

Exam Tip

दोनों को परिमेय मानने पर सहभाज्य शर्त से विरोधाभास मिलता है। इसलिए दोनों अपरिमेय हैं।

Open Question Page
Ask Friends

यदि \(\sqrt{2}\) की परिमेय मान्यता सही होती तो \(\frac{m}{n}\) के बारे में क्या होना चाहिए था?

If the rational assumption for \(\sqrt{2}\) were correct, what should be true about \(\frac{m}{n}\)?

Explanation opens after your attempt
Correct Answer

A. (m,n) सहभाज्य और \(n\neq0\)(m,n) coprime and \(n\neq0\)

Step 1

Concept

A rational number is written in lowest form as a ratio of coprime integers. The denominator cannot be zero.

Step 2

Why this answer is correct

The correct answer is A. (m,n) सहभाज्य और \(n\neq0\) / (m,n) coprime and \(n\neq0\). A rational number is written in lowest form as a ratio of coprime integers. The denominator cannot be zero.

Step 3

Exam Tip

परिमेय संख्या सरलतम रूप में सहभाज्य पूर्णांकों के अनुपात में लिखी जाती है। हर शून्य नहीं हो सकता।

Open Question Page
Ask Friends

यदि \(\sqrt{3}\) की परिमेय मान्यता सही होती तो \(\frac{p}{q}\) में क्या असंभव होता?

If the rational assumption for \(\sqrt{3}\) were correct, what would be impossible in \(\frac{p}{q}\)?

Explanation opens after your attempt
Correct Answer

B. (p) और (q) दोनों (3) से विभाज्य होनाBoth (p) and (q) being divisible by (3)

Step 1

Concept

In lowest form (p) and (q) are coprime. If both are divisible by (3), this is impossible.

Step 2

Why this answer is correct

The correct answer is B. (p) और (q) दोनों (3) से विभाज्य होना / Both (p) and (q) being divisible by (3). In lowest form (p) and (q) are coprime. If both are divisible by (3), this is impossible.

Step 3

Exam Tip

सरलतम रूप में (p) और (q) सहभाज्य होते हैं। दोनों (3) से विभाज्य हों तो यह संभव नहीं है।

Open Question Page
Ask Friends

\(\sqrt{2}\) के प्रमाण में (m) और (n) दोनों सम निकलने पर महत्तम समापवर्तक के बारे में क्या सही है?

In the proof of \(\sqrt{2}\), if both (m) and (n) are even, what is true about their highest common factor?

Explanation opens after your attempt
Correct Answer

C. कम से कम (2) होगाIt will be at least (2)

Step 1

Concept

If both are even, both are divisible by (2). So the highest common factor cannot remain (1).

Step 2

Why this answer is correct

The correct answer is C. कम से कम (2) होगा / It will be at least (2). If both are even, both are divisible by (2). So the highest common factor cannot remain (1).

Step 3

Exam Tip

दोनों सम होने पर दोनों (2) से विभाज्य हैं। इसलिए महत्तम समापवर्तक (1) नहीं रह सकता।

Open Question Page
Ask Friends

\(\sqrt{3}\) के प्रमाण में (p) और (q) दोनों (3) से विभाज्य होने पर महत्तम समापवर्तक कैसा होगा?

In the proof of \(\sqrt{3}\), if both (p) and (q) are divisible by (3), what will their highest common factor be like?

Explanation opens after your attempt
Correct Answer

D. कम से कम (3) होगाIt will be at least (3)

Step 1

Concept

Both have common factor (3). Therefore they cannot be coprime.

Step 2

Why this answer is correct

The correct answer is D. कम से कम (3) होगा / It will be at least (3). Both have common factor (3). Therefore they cannot be coprime.

Step 3

Exam Tip

दोनों में (3) सामान्य गुणनखंड है। इसलिए वे सहभाज्य नहीं हो सकते।

Open Question Page
Ask Friends

\(\sqrt{2}\) के प्रमाण में कौन-सा कथन सही कारण और निष्कर्ष दोनों देता है?

Which statement gives both correct reason and conclusion in the proof of \(\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

A. परिमेय मान्यता से (m,n) दोनों सम निकलते हैं इसलिए \(\sqrt{2}\) अपरिमेय हैRational assumption makes both (m,n) even, so \(\sqrt{2}\) is irrational

Step 1

Concept

Both even contradicts the lowest coprime fraction. This proves irrationality.

Step 2

Why this answer is correct

The correct answer is A. परिमेय मान्यता से (m,n) दोनों सम निकलते हैं इसलिए \(\sqrt{2}\) अपरिमेय है / Rational assumption makes both (m,n) even, so \(\sqrt{2}\) is irrational. Both even contradicts the lowest coprime fraction. This proves irrationality.

Step 3

Exam Tip

दोनों सम होना सरलतम सहभाज्य भिन्न से विरोधाभास है। यही अपरिमेयता सिद्ध करता है।

Open Question Page
Ask Friends

\(\sqrt{3}\) के प्रमाण में कौन-सा कथन सही कारण और निष्कर्ष दोनों देता है?

Which statement gives both correct reason and conclusion in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

B. परिमेय मान्यता से (p,q) दोनों (3) से विभाज्य निकलते हैं इसलिए \(\sqrt{3}\) अपरिमेय हैRational assumption makes both (p,q) divisible by (3), so \(\sqrt{3}\) is irrational

Step 1

Concept

Common factor (3) in both contradicts the coprime condition. Therefore \(\sqrt{3}\) is irrational.

Step 2

Why this answer is correct

The correct answer is B. परिमेय मान्यता से (p,q) दोनों (3) से विभाज्य निकलते हैं इसलिए \(\sqrt{3}\) अपरिमेय है / Rational assumption makes both (p,q) divisible by (3), so \(\sqrt{3}\) is irrational. Common factor (3) in both contradicts the coprime condition. Therefore \(\sqrt{3}\) is irrational.

Step 3

Exam Tip

दोनों में (3) सामान्य गुणनखंड मिलना सहभाज्य शर्त से विरोधाभास है। इसलिए \(\sqrt{3}\) अपरिमेय है।

Open Question Page
Ask Friends

\(\sqrt{2}\) के प्रमाण में (a=2r) किस तरह का कदम है?

In the proof of \(\sqrt{2}\), what type of step is (a=2r)?

Explanation opens after your attempt
Correct Answer

C. सम संख्या को (2) के गुणज के रूप में लिखनाWriting an even number as a multiple of (2)

Step 1

Concept

(a) has already been proved even. So it is written as the multiple (2r) of (2).

Step 2

Why this answer is correct

The correct answer is C. सम संख्या को (2) के गुणज के रूप में लिखना / Writing an even number as a multiple of (2). (a) has already been proved even. So it is written as the multiple (2r) of (2).

Step 3

Exam Tip

(a) सम सिद्ध हो चुका होता है। इसलिए उसे (2) के गुणज (2r) के रूप में लिखा जाता है।

Open Question Page
Ask Friends

\(\sqrt{3}\) के प्रमाण में (p=3k) किस बात को दर्शाता है?

In the proof of \(\sqrt{3}\), what does (p=3k) show?

Explanation opens after your attempt
Correct Answer

D. (p) (3) का गुणज है(p) is a multiple of (3)

Step 1

Concept

After \(p^2\) is divisible by (3), (p) is also divisible by (3). Therefore (p=3k) is written.

Step 2

Why this answer is correct

The correct answer is D. (p) (3) का गुणज है / (p) is a multiple of (3). After \(p^2\) is divisible by (3), (p) is also divisible by (3). Therefore (p=3k) is written.

Step 3

Exam Tip

\(p^2\) (3) से विभाज्य होने के बाद (p) भी (3) से विभाज्य होता है। इसलिए (p=3k) लिखा जाता है।

Open Question Page
Ask Friends

किस विकल्प में \(\sqrt{2}\) के प्रमाण में गलत प्रारंभिक रूप है?

Which option gives a wrong initial form in the proof of \(\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{2}=\frac{a}{0}\)

Step 1

Concept

A fraction is undefined when the denominator is zero. Therefore \(\frac{a}{0}\) is wrong.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{2}=\frac{a}{0}\). A fraction is undefined when the denominator is zero. Therefore \(\frac{a}{0}\) is wrong.

Step 3

Exam Tip

हर शून्य होने पर भिन्न परिभाषित नहीं होती। इसलिए \(\frac{a}{0}\) गलत है।

Open Question Page
Ask Friends

किस विकल्प में \(\sqrt{3}\) के प्रमाण में गलत प्रारंभिक रूप है?

Which option gives a wrong initial form in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

B. \(\sqrt{3}=\frac{p}{0}\)

Step 1

Concept

\(\frac{p}{0}\) is undefined. The denominator of a rational fraction cannot be zero.

Step 2

Why this answer is correct

The correct answer is B. \(\sqrt{3}=\frac{p}{0}\). \(\frac{p}{0}\) is undefined. The denominator of a rational fraction cannot be zero.

Step 3

Exam Tip

\(\frac{p}{0}\) परिभाषित नहीं है। परिमेय भिन्न में हर शून्य नहीं हो सकता।

Open Question Page
Ask Friends

यदि \(\sqrt{2}\) परिमेय मानने पर विरोधाभास मिलता है तो यह किस मान्यता को गलत सिद्ध करता है?

If assuming \(\sqrt{2}\) rational gives a contradiction, which assumption does it prove false?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{2}\) परिमेय है\(\sqrt{2}\) is rational

Step 1

Concept

The contradiction rejects only the rationality assumption. Therefore \(\sqrt{2}\) is proved irrational.

Step 2

Why this answer is correct

The correct answer is C. \(\sqrt{2}\) परिमेय है / \(\sqrt{2}\) is rational. The contradiction rejects only the rationality assumption. Therefore \(\sqrt{2}\) is proved irrational.

Step 3

Exam Tip

विरोधाभास केवल परिमेय मान्यता को अस्वीकार करता है। इसलिए \(\sqrt{2}\) अपरिमेय सिद्ध होता है।

Open Question Page
Ask Friends

यदि \(\sqrt{3}\) परिमेय मानने पर विरोधाभास मिले तो कौन-सा निष्कर्ष सही है?

If assuming \(\sqrt{3}\) rational gives a contradiction, which conclusion is correct?

Explanation opens after your attempt
Correct Answer

D. \(\sqrt{3}\) अपरिमेय है\(\sqrt{3}\) is irrational

Step 1

Concept

The contradiction shows the rational assumption is false. Therefore \(\sqrt{3}\) is irrational.

Step 2

Why this answer is correct

The correct answer is D. \(\sqrt{3}\) अपरिमेय है / \(\sqrt{3}\) is irrational. The contradiction shows the rational assumption is false. Therefore \(\sqrt{3}\) is irrational.

Step 3

Exam Tip

विरोधाभास परिमेय मान्यता को गलत दिखाता है। इसलिए \(\sqrt{3}\) अपरिमेय है।

Open Question Page
Ask Friends

किस विकल्प में \(\sqrt{2}\) के प्रमाण में (m) और (n) के बारे में सही भूमिका बताई गई है?

Which option correctly describes the role of (m) and (n) in the proof of \(\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

A. वे सरलतम भिन्न के सहभाज्य पूर्णांक हैंThey are coprime integers of the lowest fraction

Step 1

Concept

In the rational assumption, \(\sqrt{2}\) is written as \(\frac{m}{n}\) in lowest form. Therefore (m) and (n) are coprime integers.

Step 2

Why this answer is correct

The correct answer is A. वे सरलतम भिन्न के सहभाज्य पूर्णांक हैं / They are coprime integers of the lowest fraction. In the rational assumption, \(\sqrt{2}\) is written as \(\frac{m}{n}\) in lowest form. Therefore (m) and (n) are coprime integers.

Step 3

Exam Tip

परिमेय मान्यता में \(\sqrt{2}\) को \(\frac{m}{n}\) के सरलतम रूप में लिखा जाता है। इसलिए (m) और (n) सहभाज्य पूर्णांक हैं।

Open Question Page
Ask Friends

किस विकल्प में \(\sqrt{3}\) के प्रमाण में (p) और (q) के बारे में सही भूमिका बताई गई है?

Which option correctly describes the role of (p) and (q) in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

B. वे सरलतम भिन्न के सहभाज्य पूर्णांक हैंThey are coprime integers of the lowest fraction

Step 1

Concept

When \(\sqrt{3}\) is assumed rational, \(\frac{p}{q}\) is taken in lowest form. Therefore (p) and (q) are coprime integers.

Step 2

Why this answer is correct

The correct answer is B. वे सरलतम भिन्न के सहभाज्य पूर्णांक हैं / They are coprime integers of the lowest fraction. When \(\sqrt{3}\) is assumed rational, \(\frac{p}{q}\) is taken in lowest form. Therefore (p) and (q) are coprime integers.

Step 3

Exam Tip

\(\sqrt{3}\) को परिमेय मानते समय \(\frac{p}{q}\) सरलतम रूप में लिया जाता है। इसलिए (p) और (q) सहभाज्य पूर्णांक हैं।

Open Question Page
Ask Friends

किस विकल्प में \(\sqrt{2}\) के प्रमाण का सही मध्य उद्देश्य दिया है?

Which option gives the correct middle objective in the proof of \(\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

C. पहले (m) सम और फिर (n) सम सिद्ध करनाTo prove first (m) even and then (n) even

Step 1

Concept

Once both are proved even, a contradiction with lowest fraction is obtained. This is the middle objective.

Step 2

Why this answer is correct

The correct answer is C. पहले (m) सम और फिर (n) सम सिद्ध करना / To prove first (m) even and then (n) even. Once both are proved even, a contradiction with lowest fraction is obtained. This is the middle objective.

Step 3

Exam Tip

दोनों के सम सिद्ध होने पर सरलतम भिन्न से विरोधाभास मिलता है। यही मध्य उद्देश्य है।

Open Question Page
Ask Friends

किस विकल्प में \(\sqrt{3}\) के प्रमाण का सही मध्य उद्देश्य दिया है?

Which option gives the correct middle objective in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

D. पहले (p) और फिर (q) को (3) से विभाज्य सिद्ध करनाTo prove first (p) and then (q) divisible by (3)

Step 1

Concept

Both being divisible by (3) gives contradiction with coprime condition. This is the middle goal of the proof.

Step 2

Why this answer is correct

The correct answer is D. पहले (p) और फिर (q) को (3) से विभाज्य सिद्ध करना / To prove first (p) and then (q) divisible by (3). Both being divisible by (3) gives contradiction with coprime condition. This is the middle goal of the proof.

Step 3

Exam Tip

दोनों का (3) से विभाज्य होना सहभाज्य शर्त से विरोधाभास देता है। यही प्रमाण का मध्य लक्ष्य है।

Open Question Page
Ask Friends

यदि \(\sqrt{2}\) के प्रमाण में कोई छात्र \(a^2=2b^2\) को (a=2b) लिख देता है तो गलती क्या है?

If a student writes (a=2b) from \(a^2=2b^2\) in the proof of \(\sqrt{2}\), what is the mistake?

Explanation opens after your attempt
Correct Answer

A. वर्गमूल लेने पर सीधे ऐसा निष्कर्ष नहीं मिलताTaking square root does not directly give that conclusion

Step 1

Concept

From \(a^2=2b^2\), we get only that \(a^2\) is even and then (a) is even. Writing (a=2b) directly is not correct.

Step 2

Why this answer is correct

The correct answer is A. वर्गमूल लेने पर सीधे ऐसा निष्कर्ष नहीं मिलता / Taking square root does not directly give that conclusion. From \(a^2=2b^2\), we get only that \(a^2\) is even and then (a) is even. Writing (a=2b) directly is not correct.

Step 3

Exam Tip

\(a^2=2b^2\) से केवल \(a^2\) सम और फिर (a) सम मिलता है। सीधे (a=2b) लिखना सही नहीं है।

Open Question Page
Ask Friends

यदि \(\sqrt{3}\) के प्रमाण में कोई छात्र \(p^2=3q^2\) से सीधे (p=3q) लिख देता है तो गलती क्या है?

If a student writes (p=3q) directly from \(p^2=3q^2\) in the proof of \(\sqrt{3}\), what is the mistake?

Explanation opens after your attempt
Correct Answer

A. वर्ग संबंध से सीधे (p=3q) नहीं मिलताThe square relation does not directly give (p=3q)

Step 1

Concept

From \(p^2=3q^2\), we only get that \(p^2\) is divisible by (3). Then by the rule, (p) is written as (3k).

Step 2

Why this answer is correct

The correct answer is A. वर्ग संबंध से सीधे (p=3q) नहीं मिलता / The square relation does not directly give (p=3q). From \(p^2=3q^2\), we only get that \(p^2\) is divisible by (3). Then by the rule, (p) is written as (3k).

Step 3

Exam Tip

\(p^2=3q^2\) से केवल \(p^2\) का (3) से विभाज्य होना मिलता है। फिर नियम से (p) को (3k) लिखा जाता है।

Open Question Page
Ask Friends

\(\sqrt{2}\) के प्रमाण में (a) और (b) दोनों सम निकलने पर \(\frac{a}{b}\) के बारे में क्या सही है?

In the proof of \(\sqrt{2}\), if both (a) and (b) become even, what is true about \(\frac{a}{b}\)?

Explanation opens after your attempt
Correct Answer

A. यह सरलतम रूप में नहीं हो सकताIt cannot be in lowest form

Step 1

Concept

If both are even, (2) is a common factor. This cannot happen in a lowest fraction.

Step 2

Why this answer is correct

The correct answer is A. यह सरलतम रूप में नहीं हो सकता / It cannot be in lowest form. If both are even, (2) is a common factor. This cannot happen in a lowest fraction.

Step 3

Exam Tip

दोनों सम हों तो (2) सामान्य गुणनखंड है। सरलतम भिन्न में ऐसा नहीं हो सकता।

Open Question Page
Ask Friends

\(\sqrt{3}\) के प्रमाण में (p) और (q) दोनों (3) से विभाज्य निकलने पर \(\frac{p}{q}\) के सरलतम रूप पर क्या प्रभाव पड़ेगा?

In the proof of \(\sqrt{3}\), if both (p) and (q) become divisible by (3), what happens to the lowest form of \(\frac{p}{q}\)?

Explanation opens after your attempt
Correct Answer

A. यह सरलतम रूप नहीं रहेगाIt will not remain in lowest form

Step 1

Concept

Since both have common factor (3), the fraction can be reduced. So the lowest form assumption breaks.

Step 2

Why this answer is correct

The correct answer is A. यह सरलतम रूप नहीं रहेगा / It will not remain in lowest form. Since both have common factor (3), the fraction can be reduced. So the lowest form assumption breaks.

Step 3

Exam Tip

दोनों में सामान्य गुणनखंड (3) होने से भिन्न घटाई जा सकती है। इसलिए सरलतम रूप की मान्यता टूटती है।

Open Question Page
Ask Friends

\(\sqrt{2}\) के प्रमाण में \(a^2=2b^2\) के बाद कौन-सा कथन प्रमाण को सही दिशा देता है?

In the proof of \(\sqrt{2}\), after \(a^2=2b^2\), which statement moves the proof in the correct direction?

Explanation opens after your attempt
Correct Answer

A. (a) सम है इसलिए (a=2r)(a) is even, so (a=2r)

Step 1

Concept

Since \(a^2\) is even, (a) is even. So writing (a=2r) is the next correct step.

Step 2

Why this answer is correct

The correct answer is A. (a) सम है इसलिए (a=2r) / (a) is even, so (a=2r). Since \(a^2\) is even, (a) is even. So writing (a=2r) is the next correct step.

Step 3

Exam Tip

\(a^2\) सम होने से (a) सम होता है। इसलिए (a=2r) लिखना अगला सही कदम है।

Open Question Page
Ask Friends

\(\sqrt{3}\) के प्रमाण में \(p^2=3q^2\) के बाद कौन-सा कथन प्रमाण को आगे बढ़ाता है?

In the proof of \(\sqrt{3}\), after \(p^2=3q^2\), which statement moves the proof forward?

Explanation opens after your attempt
Correct Answer

A. (p) (3) से विभाज्य है इसलिए (p=3k)(p) is divisible by (3), so (p=3k)

Step 1

Concept

\(p^2\) is divisible by (3), so (p) is also divisible by (3). Hence (p=3k) is taken.

Step 2

Why this answer is correct

The correct answer is A. (p) (3) से विभाज्य है इसलिए (p=3k) / (p) is divisible by (3), so (p=3k). \(p^2\) is divisible by (3), so (p) is also divisible by (3). Hence (p=3k) is taken.

Step 3

Exam Tip

\(p^2\) (3) से विभाज्य है इसलिए (p) भी (3) से विभाज्य है। इसी से (p=3k) रखा जाता है।

Open Question Page
Ask Friends

किस विकल्प में \(\sqrt{2}\) के प्रमाण में प्रयुक्त सही कारण-परिणाम संबंध है?

Which option shows the correct cause-effect relation used in the proof of \(\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

A. \(a^2\) सम \(\Rightarrow\) (a) सम \(\Rightarrow\) (a=2r)\(a^2\) even \(\Rightarrow\) (a) even \(\Rightarrow\) (a=2r)

Step 1

Concept

If a square is even, the number is even. An even number is written as a multiple of (2).

Step 2

Why this answer is correct

The correct answer is A. \(a^2\) सम \(\Rightarrow\) (a) सम \(\Rightarrow\) (a=2r) / \(a^2\) even \(\Rightarrow\) (a) even \(\Rightarrow\) (a=2r). If a square is even, the number is even. An even number is written as a multiple of (2).

Step 3

Exam Tip

वर्ग सम होने से संख्या सम होती है। सम संख्या को (2) के गुणज रूप में लिखा जाता है।

Open Question Page
Ask Friends

किस विकल्प में \(\sqrt{3}\) के प्रमाण में प्रयुक्त सही कारण-परिणाम संबंध है?

Which option shows the correct cause-effect relation used in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

A. \(p^2\) (3) से विभाज्य \(\Rightarrow\) (p) (3) से विभाज्य \(\Rightarrow\) (p=3k)\(p^2\) divisible by (3) \(\Rightarrow\) (p) divisible by (3) \(\Rightarrow\) (p=3k)

Step 1

Concept

If prime (3) divides the square, it divides the number too. So writing (p=3k) is correct.

Step 2

Why this answer is correct

The correct answer is A. \(p^2\) (3) से विभाज्य \(\Rightarrow\) (p) (3) से विभाज्य \(\Rightarrow\) (p=3k) / \(p^2\) divisible by (3) \(\Rightarrow\) (p) divisible by (3) \(\Rightarrow\) (p=3k). If prime (3) divides the square, it divides the number too. So writing (p=3k) is correct.

Step 3

Exam Tip

अभाज्य (3) वर्ग को विभाजित करे तो संख्या को भी विभाजित करता है। इसलिए (p=3k) लिखना सही है।

Open Question Page
Ask Friends

\(\sqrt{2}\) और \(\sqrt{3}\) की अपरिमेयता सिद्ध करते समय कौन-सी सावधानी जरूरी है?

What caution is necessary while proving irrationality of \(\sqrt{2}\) and \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

A. भिन्न को पहले सरलतम सहभाज्य रूप में मानना चाहिएThe fraction should first be assumed in lowest coprime form

Step 1

Concept

Without lowest coprime form, the final contradiction is not clear. Write this condition in exams.

Step 2

Why this answer is correct

The correct answer is A. भिन्न को पहले सरलतम सहभाज्य रूप में मानना चाहिए / The fraction should first be assumed in lowest coprime form. Without lowest coprime form, the final contradiction is not clear. Write this condition in exams.

Step 3

Exam Tip

सरलतम सहभाज्य रूप के बिना अंतिम विरोधाभास स्पष्ट नहीं बनता। परीक्षा में यह शर्त जरूर लिखें।

Open Question Page
Ask Friends
FAQs

Class 9 Mathematics Quiz FAQs

How many questions are in this quiz?

This level is designed for 50 active questions. Currently 50 questions are available for the selected class and difficulty.

Is there a timer in this quiz?

Yes, the timer uses 35 seconds per question for Medium difficulty and shows the total remaining time on the page.

Can I open each question separately?

Yes, every question has its own SEO-friendly page with answer, explanation and related practice links.