Concept-wise Practice

tricky MCQ Questions for Class 10

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Practice Questions

1 questions tagged with tricky.

Question 1/1 Hard Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 19

\(\frac{77}{2^3\cdot 5^2\cdot 7}\) के दशमलव प्रसार का सही प्रकार क्या है?

What is the correct type of decimal expansion of \(\frac{77}{2^3\cdot 5^2\cdot 7}\)?

Explanation opens after your attempt
Correct Answer

A. सांतTerminating

Step 1

Concept

The numerator \(77=7\cdot 11\), so the factor (7) in the denominator cancels.

Step 2

Why this answer is correct

The reduced denominator becomes \(2^3\cdot 5^2\), containing only (2) and (5). Hence the decimal terminates.

Step 3

Exam Tip

In tricky questions, extra denominator factors may cancel with the numerator. चरण 1: अंश \(77=7\cdot 11\) है, इसलिए हर का (7) कट जाएगा। चरण 2: सरलतम हर \(2^3\cdot 5^2\) बचेगा, जिसमें केवल (2) और (5) हैं। इसलिए दशमलव सांत होगा। चरण 3: कठिन विकल्पों में हर के अतिरिक्त गुणनखंड अंश से कट सकते हैं।

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