Question

Read the following conjecture. Any number that is divisible by 4 is also divisible by 8. Find a counterexample to show that the conjecture is false.

Answer 1

28 is divisible by 2 but not by 8. (Gradpoint)

Explanation:

Answer 2

A counterexample would be 4.
4 is divisible by 4 but 4 is not divisible by 8.
12 is divisible by 4 but 12 is not divisible by 8.
20 is divisible by 4 but 20 is not divisible by 8.