Which is a counterexample of the following conditional? "If a number is divisible by five, then it is even." 30 25 20 18

Question

Which is a counterexample of the following conditional?

"If a number is divisible by five, then it is even."

1. 30 
2. 25 
3. 20 
4. 18

Answer 1

2 is the correct answer.

25 is not even, but it is divisible by 5.