An integer is | If... | Example |
2 | its last digit is even | 210 is even and so is divisible by 2 |
3 | its digits add up to a multiple of 3 | 18,255: add up the digits: 1+ 8 + 2 + 5 + 5 = 21 and 21 is a multiple of 3 |
4 | its last 2 digits are a multiple of 4 | 59,456: 56 ÷ 4 = 14, so 56 is a multiple of 4, which makes 59,456 divisible by 4 |
5 | its last digit is 0 or 5 | 34,875 6,730 |
6 | it's a multiple of 2 and 3 | 558 is even and so is a multiple of 2, and adding the digits gives: 5+5+8=18, and 18 is a multiple of 3, so 558 is divisible by 6 |
8 | its last 3 digits are a multiple of 8 | 6,417: add the digits: 6+4+1+7=18, and 18 is a multiple of 9 |
9 | its digits add up to a multiple of 9 | 17,336: 336 ÷ 8 = 42, so the last 3 digits are a multiple of 8, which makes 17,336, div.ble by 8 |
10 | it ends in 0 | 93,674,280 |
12 | it's a multiple of 3 and 4 | 4,932: 4+9+3+2=18 which is a multiple of 3, and 32 ÷ 4 = 8, so the last two digits are a multiple of 4 |
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