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Question

If 12q is a terminating decimal number, then which of the following is a possible value of q?

A
7
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B
9
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C
15
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D
21
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Solution

The correct option is C 15
127 denominator = 7
129=43 denominator = 3
1215=45 denominator = 5 (of the form 2m×5n)
1221=47 denominator = 7
Thus, among the given options, the only possible value of q that satisfies the given condition is 15.

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