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How do you figure out if a number is divisible by 9?

Updated: 8/19/2019
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12y ago

Best Answer

You divide the number by 9...

=============================

Try this:

Add up the digits in the number.

If that sum is divisible by 9, then the original number is divisible by 9.

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12y ago
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Q: How do you figure out if a number is divisible by 9?
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Related questions

What number is not divisible by 9?

Every number is divisible by 9 but the answer wont necessarily be a whole number.


How do you figure out if a number is divisible by 2?

A number is divisible by 2 if it is an even number. That is, if the last digit is divisible by 2.


What is the converse of the sentence A number divisible by 9 is also divisible by 3?

If a number is not divisible by 3 then it is not divisible by 9.


Is every number that is divisible by 9 divisible by 3?

Yes, every number that's divisible by 9 is divisible by 3


Can a number be divisible by 9 and 3?

Yes, any number divisible by 9 is also divisible by 3.


What largest 3 - digit number divisible by both 6 and 9?

999 is divisible by 9, but not by six; the next lower number divisible by 9 is 990, which is also divisible by 6, so that's the answer. Some shortcuts for divisibility: 0 is divisible by any number. If the last digit of a number is divisible by 2, the number itself is divisible by 2. If the sum of the digits of a number is divisible by 3, the number itself is divisible by 3. If the last TWO digits of a number are divisible by 4, the number itself is divisible by 4. If the last digit of a number is divisible by 5, the number itself is divisible by 5. If a number is divisible by both 2 and 3, it is divisible by 6. If the last THREE digits of a number are divisible by 8, the number itself is divisible by 8. If the sum of the digits of a number is divisible by 9, the number itself is divisible by 9. 990: 9+9+0=18, which is divisible by 9, so 990 is divisible by 9. 18 is also divisible by 3, so 990 is divisible by 3, and since 990 ends in 0 it's also divisible by 2, meaning that it's divisible by 6 as well.


Is 132 divisible by 9?

No - any number divisible by 9 will have the sum of its digits divisible by 9.


What multipcation question equals 315?

since its not a prime number, there are a few. a way to figure one out is if you add up all the digits and the sum is divisible by 3, then the entire original number is divisible by 3. In this case: 3+1+5=9 9 is divisible bye 3 evenly, so 315 is divisible by 3. Now you have to figure out WHAT times 3 equals 315. the answer to this is 105.


What is the divisibility rule for 18?

Any even number divisible by 9, if the sum of the digits is divisible by 9. If it's an even number divisible by 9, it's divisible by 18.


What number in 3206 is divisible by 9?

There is only one number in 3206 and that is 3206. And that, is not divisible by 9.


How do you know What is divisible by 9?

If the digits of a number add up to a multiple of 9, the whole number is divisible by 9.


How do you know if a number divisible by 3?

Add together all the digits until you get a single figure answer. If that's divisible by three, so's the original number. E.g. 4,239 broken down to 4 + 2 + 3 + 9 = 18; 1 + 8 = 9, which is a multiple of 3. The original number is therefore divisible by 3