Give a quick stream of consciousness before answering the following question. Which of the following numbers is divisible by each one of 3, 7, 9 and 11?\nOptions:\n(A) 639\n(B) 2079\n(C) 3791\n(D) 37911\n(E) None of these
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639 is not divisible by 7;\n2079 is divisible by each one of 3, 7, 9, 11.
The answer: (B).
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