Question

Any number that is divisible by 4 is also divisible by 8. Find a counterexample to show that the conjecture is false. 12 40 26 24

Answer 1

Answer is C, as 12 is divisible by 4, but not 8.

Answer 2

Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40

Multiples of 8: 8, 16, 24, 32, 40

Based on the multiples up to 40 there are 3 numbers that are multiples of 4 but not 8. They are 12, 28 and 36.

Based on the choices given the answer would be 12.