Q: How do you know if a number is divisible by nine?

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Yes, to test for divisible by 9: add the digits together [2+3+4+0=9]. If the sum equals nine, or a number divisible by nine, then the original number is divisible by nine. Example: 4752; 4+7+5+2 = 18, which is divisible by 9. If you're not sure, 1+8=9. You can always keep adding the digits together, and eventually you'll be left with a single digit number. If the sum is equal to 9, then the original number is divisible by 9.

Yes. 27,000 is evenly divisible by nine.

If the number is even and the sum of its digits is divisible by nine then the number is divisible by 18.

Three is a factor of nine.

144 is divisible by 12 and 9.

Related questions

No, a number can only be divisible by a number smaller than it

No. 74,845 is not evenly divisible by nine.

Yes, to test for divisible by 9: add the digits together [2+3+4+0=9]. If the sum equals nine, or a number divisible by nine, then the original number is divisible by nine. Example: 4752; 4+7+5+2 = 18, which is divisible by 9. If you're not sure, 1+8=9. You can always keep adding the digits together, and eventually you'll be left with a single digit number. If the sum is equal to 9, then the original number is divisible by 9.

Add the digits of the number. If that total is divisible by nine, so is the original number. Example: 12,345,678 The digits total 36. 36 is divisible by 9. So is 12,345,678.

The sum of the digits of the number will add to a number that's divisible by nine. For example, 99 -> 9+9 -> 18. 18 is divisible by nine, thus 99 is. Any whole number that's divisible by nine will have its digits add up like this, and any whole number whose digits add up like this will be divisible by nine.

72

All multiples of nine, which is an infinite number.

Yes. 27,000 is evenly divisible by nine.

663 is divisible by i dont know . but i do know that it can not be a even number so it has to be divisible by a odd number

If the number is even and the sum of its digits is divisible by nine then the number is divisible by 18.

Yes, it is. One way to tell if a number is divisible by nine is to add up all of the numbers until you get a one digit number, and if the number isn't nine, the number isn't divisible by nine. 4+8+6+0= 18 1+8=9

Three is a factor of nine.