Let x=pq be a rational number, such that the prime factorization of q is of the form 2n5m, where n,m are non-negative integers. Then x has a decimal expansion which terminates.
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Solution
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The form of q is 2n∗5m q can be 1,2,5,10,20,40.... Any integer divided by these numbers will always give a terminating decimal number.
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