Some question: Which of the following numbers is divisible by each one of 3, 7, 9 and 11?
Options:
(A) 639
(B) 2079
(C) 3791
(D) 37911
(E) None of these
Some stream of consciousness:
639 is not divisible by 7;
2079 is divisible by each one of 3, 7, 9, 11. The answer: (B).