Which is the converse of: If an integer is divisible by 40, then it is divisible by 20?
If it is not divisible by 20, then it is not divisible by 40.
If it is not divisible by 40, then it is divisible by 20.
If it is divisible by 40, then it is divisible by 20.
If it is divisible by 20, then it is divisible by 40.