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1- Any number is divisible by 1.

2- Any even number is divisible by 2.

3- If its digits add up to a number divisible by 3, the whole number is divisible by 3.

4- If the last two digits are divisible by 4, the whole number is divisible by 4.

5- If it ends in 5 or 0, the whole number is divisible by 5.

6- If it's even and also divisible by 3, the whole number is divisible by 6.

7- There is no rule for 7.

8- If the last three digits are divisible by 8, the whole number is divisible by 8.

9- If its digits add up to a number divisible by 9, the whole number is divisible by 9.

10- If it ends in 0, the whole number is divisible by 10.

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โˆ™ 2012-05-30 21:21:42
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Q: What are the rules of divisibility?
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bogo mo!