Answer: 25
Step-by-step explanation:
The given word phrase : "If a number is divisible by five, then it is divisible by ten. "
From the given options , 20 , 30 and 100 are the numbers which satisfy the above phrase .
i.e..all of them are divisible by 5 and 10 both because the last digit is 0 (Divisibility rule for 10 says a number if divisible by 10 if its last digit is 0.).
But 25 is the number which is divisible by 5 but not 10 because its last digit is not 0.
Therefore , a counterexample that proves the conditional statement false =25
