GMAT Question of the Day

STJ DS 38

P and Q are integers. If P is divisible by 10^Q and cannot be divisible by 10^(Q+1), Q=? (1) P is divisible by 2^5, but is not divisible by 2^6 (2) P is divisible by 5^6, but is not divisible by 5^7 Can anybody explain why the answer is C. I appreciate

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