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LCM of 39 and 15 is ___

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195

answer is A.

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Detailed Solution

Reduce 39 and 15 to their prime Factors.

39 = 3 x 13
15 = 3 x 5
Considering the highest power of all factors we get,
LCM (39, 15) = 3 x 5 x 13 = 195

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