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All whole numbers are divisible by 1.

Numbers are divisible by 2 if they end in 2, 4, 6, 8 or 0.

Numbers are divisible by 3 if the sum of their digits is divisible by 3.

Numbers are divisible by 4 if the last two digits of the number are divisible by 4.

Numbers are divisible by 5 if the last digit of the number is either 5 or 0.

Numbers are divisible by 6 if they are divisible by 2 and 3.

Numbers are divisible by 9 if the sum of their digits is equal to 9 or a multiple of 9.

Numbers are divisible by 10 if the last digit of the number is 0.

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Q: What are the divisibility rules for 1 2 3 4 5 6 9 and 10?

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12

Do the division, if there is no remainder, it is divisible. Seriously, many of the "divisibility rules" that have been discovered become more complicated than doing the actual division. For practical purposes, just learn the divisibility rules for a few simple cases (divisibility rules by 2, 4, 8, 5, 10, 3, 9, 7, 11, and 13), and for all other cases, just do the division.

26

1, 2, 4, 5, 10, 20 The rules of divisibility tell us that 20 is divisible by 1, 2 and 4. Dividing those into 20 gives us the rest. 1, 2, 4, 5, 10, 20

1000 times 1000 is divisible by 2, 4, 5, 8 and 10.

Those for 1, 2, 4, 5 and 8.

3 and 9. And they divide into 123456789 whether or not you use divisibility rules!

It is divisible by any of its factors which are: 1, 2, 3, 6, 7, 14, 21 and 42

2 squared 1 = 4 so the divisibility rule is that it is divisible by 1, 2 and 4.

Since 10 is an even number ending in zero, it's divisible by 2, 5 and 10. (10,1)(5,2)

The divisibility rule for 2 works because the base of our number system, 10, is divisible by 2.

If you know the rules of divisibility, you know that 100 is divisible by 1, 2, 4, 5 and 10. Divide those numbers into 100. That's the rest. 100: 1, 2, 4, 5, 10, 20, 25, 50, 100

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