Which of the following is a counterexample that proves the conditional statement false? if a number is divisible by four, then it is divisible by eight

A number is said to be divisible by 8 iff the last 3 digits are divisible by 8 and by 4 if the last 2 digits r divisible by 4. So 500 can be taken as an example which is divisible by 4 but not by 8.