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Bunuel
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Bunuel
If N is an integer, is 36/N an integer?

(1) N is a multiple of 9.
(2) 9 < N < 27

Question: Is N a factor of 36?

St 1: If N = 9, answer to the question is YES

If N = 27, answer to the question is NO

Insufficient

St 2: If N = 18, answer to the question is YES

If N = 15, answer to the question is NO

Insufficient

Combining we get N = 18, answer to the question is YES only. Sufficient

(C)
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