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decimal conversion MCQ Questions for Class 10

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Practice Questions

20 questions tagged with decimal conversion.

Question 1/20 Expert Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 21

\(\frac{23}{2^5\cdot 5^9}\) को \(\frac{N}{10^9}\) के रूप में लिखने पर (N) क्या होगा?

If \(\frac{23}{2^5\cdot 5^9}\) is written as \(\frac{N}{10^9}\), what is (N)?

Explanation opens after your attempt
Correct Answer

B. (368)

Step 1

Concept

Since \(10^9=2^9\cdot 5^9\), the denominator lacks \(2^4\). Therefore \(N=23\cdot 16=368\).

Step 2

Why this answer is correct

The correct answer is B. (368). Since \(10^9=2^9\cdot 5^9\), the denominator lacks \(2^4\). Therefore \(N=23\cdot 16=368\).

Step 3

Exam Tip

\(10^9=2^9\cdot 5^9\) है इसलिए हर में \(2^4\) की कमी है। \(N=23\cdot 16=368\) होगा।

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Question 2/20 Expert Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 21

कौन-सा विकल्प (0.00015625) का सरलतम भिन्न रूप है?

Which option is the lowest fraction form of (0.00015625)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{1}{6400}\)

Step 1

Concept

\(0.00015625=\frac{15625}{100000000}\), and reducing by (15625) gives \(\frac{1}{6400}\). Do not forget to cancel common factors in large denominators.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{1}{6400}\). \(0.00015625=\frac{15625}{100000000}\), and reducing by (15625) gives \(\frac{1}{6400}\). Do not forget to cancel common factors in large denominators.

Step 3

Exam Tip

\(0.00015625=\frac{15625}{100000000}\) है और (15625) से सरल करने पर \(\frac{1}{6400}\) मिलता है। बड़े हर में समान गुणनखंड काटना न भूलें।

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Question 3/20 Expert Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 21

(0.046875) का सरलतम भिन्न रूप कौन-सा है?

Which is the lowest fraction form of (0.046875)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{3}{64}\)

Step 1

Concept

\(0.046875=\frac{46875}{1000000}\), and reducing gives \(\frac{3}{64}\). Convert the decimal to a fraction and reduce fully.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{3}{64}\). \(0.046875=\frac{46875}{1000000}\), and reducing gives \(\frac{3}{64}\). Convert the decimal to a fraction and reduce fully.

Step 3

Exam Tip

\(0.046875=\frac{46875}{1000000}\) है और सरल करने पर \(\frac{3}{64}\) मिलता है। दशमलव से भिन्न बनाकर अंतिम रूप तक सरल करें।

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Question 4/20 Expert Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 20

कौन-सा विकल्प (0.0003125) का सरलतम भिन्न रूप है?

Which option is the lowest fraction form of (0.0003125)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{1}{3200}\)

Step 1

Concept

\(0.0003125=\frac{3125}{10000000}\), and reducing by (3125) gives \(\frac{1}{3200}\). Do not forget to cancel common factors in large denominators.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{1}{3200}\). \(0.0003125=\frac{3125}{10000000}\), and reducing by (3125) gives \(\frac{1}{3200}\). Do not forget to cancel common factors in large denominators.

Step 3

Exam Tip

\(0.0003125=\frac{3125}{10000000}\) है और (3125) से सरल करने पर \(\frac{1}{3200}\) मिलता है। बड़े हर में समान गुणनखंड काटना न भूलें।

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Question 5/20 Expert Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 20

(0.01875) का सरलतम भिन्न रूप कौन-सा है?

Which is the lowest fraction form of (0.01875)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{3}{160}\)

Step 1

Concept

\(0.01875=\frac{1875}{100000}\), and dividing by (625) gives \(\frac{3}{160}\). Convert the decimal to a fraction and reduce fully.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{3}{160}\). \(0.01875=\frac{1875}{100000}\), and dividing by (625) gives \(\frac{3}{160}\). Convert the decimal to a fraction and reduce fully.

Step 3

Exam Tip

\(0.01875=\frac{1875}{100000}\) है और (625) से भाग देने पर \(\frac{3}{160}\) मिलता है। दशमलव से भिन्न बनाकर अंतिम रूप तक सरल करें।

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Question 6/20 Expert Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 20

(0.00096) को सरलतम भिन्न में लिखने पर हर क्या होगा?

What is the denominator when (0.00096) is written as a fraction in lowest form?

Explanation opens after your attempt
Correct Answer

B. (3125)

Step 1

Concept

\(0.00096=\frac{96}{100000}=\frac{3}{3125}\), so the denominator is (3125). Convert the decimal to a fraction and reduce fully.

Step 2

Why this answer is correct

The correct answer is B. (3125). \(0.00096=\frac{96}{100000}=\frac{3}{3125}\), so the denominator is (3125). Convert the decimal to a fraction and reduce fully.

Step 3

Exam Tip

\(0.00096=\frac{96}{100000}=\frac{3}{3125}\) है इसलिए हर (3125) है। दशमलव को भिन्न में बदलकर पूरा सरल करें।

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Question 7/20 Expert Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 20

\(0.2\overline{54}\) का सरलतम भिन्न रूप कौन-सा है?

Which is the lowest fraction form of \(0.2\overline{54}\)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{14}{55}\)

Step 1

Concept

The non-repeating part (2) and repeating part (54) give \(\frac{252}{990}\), which reduces to \(\frac{14}{55}\). In exams, identify repeating and non-repeating digits separately.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{14}{55}\). The non-repeating part (2) and repeating part (54) give \(\frac{252}{990}\), which reduces to \(\frac{14}{55}\). In exams, identify repeating and non-repeating digits separately.

Step 3

Exam Tip

सांत भाग (2) और आवर्ती भाग (54) से भिन्न \(\frac{252}{990}\) बनती है जो \(\frac{14}{55}\) तक सरल होती है। परीक्षा में आवर्ती और अनावर्ती अंकों को अलग पहचानें।

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Question 8/20 Expert Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 19

कौन-सा विकल्प (0.000625) का सरलतम भिन्न रूप है?

Which option is the lowest fraction form of (0.000625)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{1}{1600}\)

Step 1

Concept

\(0.000625=\frac{625}{1000000}\), and reducing by (625) gives \(\frac{1}{1600}\). Do not fear large denominators; cancel common factors.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{1}{1600}\). \(0.000625=\frac{625}{1000000}\), and reducing by (625) gives \(\frac{1}{1600}\). Do not fear large denominators; cancel common factors.

Step 3

Exam Tip

\(0.000625=\frac{625}{1000000}\), जिसे (625) से सरल करने पर \(\frac{1}{1600}\) मिलता है। बड़े हर से डरें नहीं, समान गुणनखंड काटें।

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Question 9/20 Expert Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 19

(0.0375) का सरलतम भिन्न रूप कौन-सा है?

Which is the lowest fraction form of (0.0375)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{3}{80}\)

Step 1

Concept

\(0.0375=\frac{375}{10000}\), and dividing by (125) gives \(\frac{3}{80}\). Convert the decimal to a fraction and reduce fully.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{3}{80}\). \(0.0375=\frac{375}{10000}\), and dividing by (125) gives \(\frac{3}{80}\). Convert the decimal to a fraction and reduce fully.

Step 3

Exam Tip

\(0.0375=\frac{375}{10000}\) और (125) से भाग देने पर \(\frac{3}{80}\) मिलता है। दशमलव से भिन्न बनाकर अंतिम रूप तक सरल करें।

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Question 10/20 Expert Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 19

\(\frac{11}{2^6\cdot 5^2}\) को \(\frac{N}{10^6}\) के रूप में लिखने पर (N) क्या होगा?

If \(\frac{11}{2^6\cdot 5^2}\) is written as \(\frac{N}{10^6}\), what is (N)?

Explanation opens after your attempt
Correct Answer

B. (1375)

Step 1

Concept

Since \(10^6=2^6\cdot 5^6\), the denominator lacks \(5^4\). Thus \(N=11\cdot 5^4=6875\), so the correct option is (6875).

Step 2

Why this answer is correct

The correct answer is B. (1375). Since \(10^6=2^6\cdot 5^6\), the denominator lacks \(5^4\). Thus \(N=11\cdot 5^4=6875\), so the correct option is (6875).

Step 3

Exam Tip

\(10^6=2^6\cdot 5^6\), इसलिए हर में \(5^4\) की कमी है। \(N=11\cdot 5^4=6875\), इसलिए सही विकल्प (6875) है।

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Question 11/20 Expert Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 19

(0.00072) का सरलतम भिन्न रूप कौन-सा है?

Which is the lowest fraction form of (0.00072)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{9}{12500}\)

Step 1

Concept

\(0.00072=\frac{72}{100000}\), and reducing by (8) gives \(\frac{9}{12500}\). First write the denominator as a power of (10), then reduce.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{9}{12500}\). \(0.00072=\frac{72}{100000}\), and reducing by (8) gives \(\frac{9}{12500}\). First write the denominator as a power of (10), then reduce.

Step 3

Exam Tip

\(0.00072=\frac{72}{100000}\), जिसे (8) से सरल करने पर \(\frac{9}{12500}\) मिलता है। पहले (10) की घात वाला हर बनाकर फिर भिन्न को सरल करें।

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Question 12/20 Hard Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 21

\(\frac{7}{2^3\cdot 5^5}\) को \(\frac{N}{10^5}\) के रूप में लिखने पर (N) क्या होगा?

If \(\frac{7}{2^3\cdot 5^5}\) is written as \(\frac{N}{10^5}\), what is (N)?

Explanation opens after your attempt
Correct Answer

B. (28)

Step 1

Concept

We need \(10^5=2^5\cdot 5^5\).

Step 2

Why this answer is correct

The denominator \(2^3\cdot 5^5\) lacks \(2^2\). Multiplying numerator and denominator by (4) gives \(N=7\cdot 4=28\).

Step 3

Exam Tip

Multiply by the missing part to make the denominator \(10^k\). चरण 1: \(10^5=2^5\cdot 5^5\) चाहिए। चरण 2: हर \(2^3\cdot 5^5\) में \(2^2\) की कमी है। अंश और हर को (4) से गुणा करने पर \(N=7\cdot 4=28\)। चरण 3: हर को \(10^k\) बनाने के लिए कमी वाले भाग से गुणा करें।

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Question 13/20 Hard Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 20

\(\frac{17}{2^2\cdot 5^6}\) को \(\frac{N}{10^6}\) के रूप में लिखा जाए, तो (N) क्या होगा?

If \(\frac{17}{2^2\cdot 5^6}\) is written as \(\frac{N}{10^6}\), what is (N)?

Explanation opens after your attempt
Correct Answer

C. (272)

Step 1

Concept

We need \(10^6=2^6\cdot 5^6\).

Step 2

Why this answer is correct

The denominator \(2^2\cdot 5^6\) lacks \(2^4\), so multiply numerator and denominator by (16). Thus \(N=17\cdot 16=272\).

Step 3

Exam Tip

Multiply by the missing prime power. चरण 1: \(10^6=2^6\cdot 5^6\) चाहिए। चरण 2: हर \(2^2\cdot 5^6\) में \(2^4\) की कमी है, इसलिए अंश और हर को (16) से गुणा करेंगे। \(N=17\cdot 16=272\)। चरण 3: कमी वाले अभाज्य गुणनखंड से ही गुणा करें।

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Question 14/20 Hard Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 19

यदि \(x=\frac{3}{2^m5^n}\) और (m<n), तो (x) को सांत दशमलव में लिखने के लिए अंश और हर को किससे गुणा करना चाहिए?

If \(x=\frac{3}{2^m5^n}\) and (m<n), by what should numerator and denominator be multiplied to write (x) as a terminating decimal?

Explanation opens after your attempt
Correct Answer

A. \(2^{n-m}\)

Step 1

Concept

The denominator is \(2^m5^n\), and the power of (5) is larger.

Step 2

Why this answer is correct

To make \(10^n=2^n5^n\), the power of (2) must be increased to (n). So multiply by \(2^{n-m}\).

Step 3

Exam Tip

First identify which prime power is short. चरण 1: हर \(2^m5^n\) है और (5) की घात अधिक है। चरण 2: \(10^n=2^n5^n\) बनाने के लिए (2) की घात (n) तक बढ़ानी होगी। इसलिए \(2^{n-m}\) से गुणा करेंगे। चरण 3: कमी किस अभाज्य घात में है, पहले वही पहचानें।

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Question 15/20 Medium Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 21

\(\frac{7}{1250}\) का दशमलव रूप कौन-सा है?

What is the decimal form of \(\frac{7}{1250}\)?

Explanation opens after your attempt
Correct Answer

A. (0.0056)

Step 1

Concept

\(1250\times8=10000\).

Step 2

Why this answer is correct

\(\frac{7}{1250}=\frac{56}{10000}=0.0056\).

Step 3

Exam Tip

Converting the denominator into a power of (10) is a quick and safe method. चरण 1: \(1250\times8=10000\) है। चरण 2: \(\frac{7}{1250}=\frac{56}{10000}=0.0056\) होगा। चरण 3: हर को (10) की घात में बदलना तेज और सुरक्षित तरीका है।

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Question 16/20 Medium Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 20

\(\frac{18}{125}\) का दशमलव रूप कौन-सा है?

What is the decimal form of \(\frac{18}{125}\)?

Explanation opens after your attempt
Correct Answer

A. (0.144)

Step 1

Concept

\(125\times8=1000\).

Step 2

Why this answer is correct

\(\frac{18}{125}=\frac{144}{1000}=0.144\).

Step 3

Exam Tip

Converting the denominator to (10), (100), or (1000) is a quick method. चरण 1: \(125\times8=1000\) है। चरण 2: \(\frac{18}{125}=\frac{144}{1000}=0.144\) होगा। चरण 3: हर को (10), (100), (1000) में बदलना तेज तरीका है।

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Question 17/20 Easy Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 21

\(\frac{14}{35}\) को दशमलव में बदलने से पहले कौन सा सरल रूप मिलेगा?

What lowest form is obtained before converting \(\frac{14}{35}\) into a decimal?

Explanation opens after your attempt
Correct Answer

A. \(\frac{2}{5}\)

Step 1

Concept

(14) and (35) have common factor (7).

Step 2

Why this answer is correct

\(\frac{14}{35}=\frac{2}{5}\), so the decimal is (0.4).

Step 3

Exam Tip

Exam tip: Writing the lowest form often earns the main mark. चरण 1: (14) और (35) का सामान्य गुणनखंड (7) है। चरण 2: \(\frac{14}{35}=\frac{2}{5}\), इसलिए दशमलव (0.4) होगा। चरण 3: परीक्षा सुझाव: सरल रूप लिखना कई प्रश्नों में पूरा अंक दिलाता है।

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Question 18/20 Easy Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 21

\(\frac{4}{625}\) का सही दशमलव रूप चुनिए।

Choose the correct decimal form of \(\frac{4}{625}\).

Explanation opens after your attempt
Correct Answer

B. (0.0064)

Step 1

Concept

\(625\times16=10000\).

Step 2

Why this answer is correct

\(\frac{4}{625}=\frac{64}{10000}=0.0064\).

Step 3

Exam Tip

Exam tip: Count zeros carefully while placing the decimal point. चरण 1: \(625\times16=10000\) है। चरण 2: \(\frac{4}{625}=\frac{64}{10000}=0.0064\) है। चरण 3: परीक्षा सुझाव: शून्यों की संख्या गिनते समय जल्दबाजी न करें।

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Question 19/20 Easy Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 19

दशमलव (0.04) का सरल भिन्न रूप क्या है?

What is the simplest fractional form of (0.04)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{1}{25}\)

Step 1

Concept

\(0.04=\frac{4}{100}\).

Step 2

Why this answer is correct

Dividing by (4) gives \(\frac{1}{25}\).

Step 3

Exam Tip

In decimals with zeros, counting decimal places is very important. चरण 1: \(0.04=\frac{4}{100}\) है। चरण 2: (4) से काटने पर \(\frac{1}{25}\) मिलता है। चरण 3: शून्य वाले दशमलवों में दशमलव स्थान गिनना बहुत जरूरी है।

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Question 20/20 Easy Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 19

\(\frac{7}{25}\) का दशमलव रूप क्या है?

What is the decimal form of \(\frac{7}{25}\)?

Explanation opens after your attempt
Correct Answer

A. (0.28)

Step 1

Concept

Multiply (25) by (4) to make (100).

Step 2

Why this answer is correct

\(\frac{7}{25}=\frac{28}{100}=0.28\).

Step 3

Exam Tip

When converting to decimal, multiply numerator and denominator by the same number. चरण 1: (25) को (100) बनाने के लिए (4) से गुणा करें। चरण 2: \(\frac{7}{25}=\frac{28}{100}=0.28\) है। चरण 3: दशमलव में बदलते समय अंश और भाजक दोनों को समान संख्या से गुणा करें।

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