Which of the following is a counterexample that proves the conditional statement false?
if a number is divisible by five, then it is divisible by ten.
a. 20
b. 25
c. 30
d. 100

Wouldn’t it be B? Because all the other numbers are divisible by 5 and 10 but not 25. And the statement says that the number needs to be divisible by 5 and 10. However, you’re looking for a counter example that proves the statement false so the only number that does that is 25.

Th answer is B. Because it’s divisible by 5 but not by 10.

What mathematical statement is missing ? ? the answer is b