Question

What is the counterexample for the conjecture?

Any number that is divisible by 4 is also divisible by 8.

a. 24
b. 40
c. 12
d. 26

I know that 12 isn't divisible by 8 because 12/8 = 1.5 and 26 isn't divisible by 4 because 26/4 = 6.5

Answer 1

A counterexample will be a number that is divisible by 4 but NOT divisible by 8.
24: divisible by 4 and 8
40: divisible by 4 and 8
12: divisible by 4. NOT divisible by 8. Bingo.

Answer 2

Thanks