100 - the last 2 digits are 00
25 - the last 2 digits are 00, 25, 50 or 75
10 - the last digit is 0
2 - the last digit is 0, 2, 4, 6 or 8
3 - the sum of the digits is divisible by 3
4 - the last 2 digits are divisible by 4
5 - the last digit is 0 or 5
6 - the number is even and divisible by 3
8 - the last 3 digits are divisible by 8
9 - the sum of the digits is divisible by 9. 
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