Use some thinking to answer the following question. Select Odd number:\n6, 9, 15, 21, 24, 28, 30\nOptions:\n(A) 20\n(B) 21\n(C) 24\n(D) 28\n(E) 30
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Each of the numbers except 28, is a multiple of 3. So the final answer is (D).
Assistant