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CAT 1997 | Question: 111

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The expression can be written as 16n + 7 + 6/n. For this expression to be a natutal number, 6/n must be a natural number.

6/n can be a natural number if value of n is either 1, 2, 3, 6

Hence, we have 4 possible values of n. So, the answer would be option C
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