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Bunuel
If a and b are both prime integers, which of the following could not be the product of a and b?

A. 14
B. 102
C. 133
D. 142
E. 237

Do Prime Factorization and find which answer will have more than 2 prime factors.

102 --> 2x51 --> 2x3x17. This is 3 factors, so you can not have AB=102 while A and B are both Prime numbers.

Answer: B
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A) 14----7*2
B) 102----17*3*2-------3 factors---a*b*c
C) 133----19*7
D) 142----2*71
E) 237 ---3*79

Hence option B is correct choice.
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