Which fraction will have a terminating decimal expansion even though the given denominator shows a factor (13)?
Answer and explanation
Correct answer: (\frac{91}{2^2\cdot 5\cdot 13})
Step 1: (91=7\cdot 13), so the factor (13) in the denominator cancels. Step 2: The reduced denominator is (2^2\cdot 5), containing only (2) and (5). Hence the decimal terminates. Step 3: An extra prime factor may cancel with the numerator.
Frequently asked questions
What is the correct answer to this question?
(\frac{91}{2^2\cdot 5\cdot 13})
Why is this the correct answer?
Step 1: (91=7\cdot 13), so the factor (13) in the denominator cancels. Step 2: The reduced denominator is (2^2\cdot 5), containing only (2) and (5). Hence the decimal terminates. Step 3: An extra prime factor may cancel with the numerator.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Real Numbers. Topic: Decimal expansion of rational numbers.
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