A natural number is divisible by 10 if and only if the last digit is 0.
730 is divisible by 10 since the last digit is 0.
733 is NOT divisible by 10 since the last digit (3) is NOT 0.
716 123 456 789 098 765 432 100 is divisible by 10 since the last digit is 0.
717 123 456 789 098 765 432 109 is NOT divisible by 10 since the last digit (9) is NOT 0.