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A natural number is divisible by
2, when the last digit is a 0, 2, 4, 6,
8,
5, when the last digit is a 0 or a
5,
10, when the last digit is a 0,
3 when the checksum is divisible by
three,
9, when the checksum is divisible by
9,
4, when the last two digits together,
make a number that is divisible by four,
25, when the last two digits of a
number are added and the answer is then divisible by 25,
8, when the last three digits of a
number added together make a number that is divisible by 8,
125, when the last three digits of a
number make a number that is divisible by 125.
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