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Irrational Numbers

Which of the ...

Question

Which of the following can be the denominator for a terminating decimal ?

A

2

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B

3

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C

9

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D

7

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Solution

The correct option is A 2
A terminating decimal has $2^{n}$ , $5^{m}$ or $2^{n} \times 5^{m}$ in its denominator.

Hence, 3, 9 and 7 cannot be in the denominator for a terminating decimal.

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