Question

If "a" is a factor of 34, and "b" is a factor of 42, then the product of "a" and "b" could NOT be which of the following?

A. 8

B. 17

C. 84

D. 102

E. 238

Answer 1

34 = 2 * 17
42 = 2 * 3 * 7

Answer 2

27?

Answer 3

it can't be 8 either

Answer 4

102 - this can be a product : 102 = 6 * 17

Answer 5

if we include 1 , 34 and 42 are factors - they ar distinct factors
then 17 = 1 * 17 so thats an allowed product
2*42 = 84 - thats ok

Answer 6

34 * 7 = 238

Answer 7

so the answer is A (8)