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Question

Let x= pq be a rational number, such that the prime factorisation of q is not of the form 2m5n, where n, m are non-negative integers. Then, x has a decimal expansion which is ___.

A
non-terminating repeating (recurring)
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B
terminating non-repeating (non-recurring)
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C
real integer
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D
none of these
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Solution

The correct option is A non-terminating repeating (recurring)
A rational pq has a decimal expansion which is terminating only when the denominator can be prime factorised in the form 2m5n. If the denominator has any other prime factor, then the decimal becomes non-terminating and repeating.

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