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

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โˆ™ 2013-05-26 02:20:33
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Q: How do you know What is divisible by 9?
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Related questions

How do you know a number is divisible by 9?

If its digital sum add up to 9 then it is divisible by 9


How do you know a number is divisible by 9 if?

A number is divisible by 9 of its digits add up to a multiple of 9.


Is 342 disvisibel by 9?

yes, you know that because if you add the digits together and that number is divisible by 9, then that large number is divisible by 9. 3+4+2 is 9, which is divisible by 9. conclusion 342 is divisible by 9.


How do you know how a number is divisible by nine?

Add the digits and see if they equal a number divisible by nine.Example: 99 is divisible by 9 because 9 + 9 = 18 (18 is divisible by 9)


Are all numbers that are divisible by 9 also divisible by 3 are all numbers that are divisible by 3 also divisible by 9 how do you know?

All numbers divisible by 9 are divisible by 3; since 9 = 3 x 3 all multiples of 9 are also multiples of 3. However, all numbers divisible by 3 are not divisible by 9, eg 6 = 2 x 3 but 6 is not divisible by 9 (since 6 is not a multiple of 9) - it only takes one counter example to disprove a theory.


What is the divisibility rule of 9?

If the sum of all the digits is divisible by 9, then the entire number is divisible by 9! For example: 9,728,127 is divisible by 9. 9+7+2+8+1+2+7=36, and I know 36 is divisible by 9. Therefore, the whole number is. 982 is not. 9+2+8=19. 19 is not divisible by 9.Works for really huge numbers too. 3,456,245,190,769,984,245,865,992,831 The sum of the digits is 144. Unsure if that works? Find the sum of THOSE digits (and keep doing that until you get something that you KNOW is divisible by 9). 1+4+4=9. That means the whole huge number is divisible by 9!


How do you know that 729 is not a prime number?

It is divisible by 9.


Is 4788 divisible by 9?

The easiest way to know if a number is divisible by 9 is to add the digits in the number. 4 + 7 + 8 + 8 = 27 Since 9 will go into 27 evenly, 4788 is divisible by 9.


Can you divide 247 into 9?

Yes, but not evenly. The answer is 27 4/9 or 27.44444444444. An easy way to know if the number is evenly divisible by 9 is to sum the digits - if the sum is divisible by 9, so is your number. In this case 2 + 4 + 7 = 13 which is not divisible by 9.


Are all numbers divisible by 3 also by 9 give example?

All numbers divisible by 3 are NOT divisible by 9. As an example, 6, which is divisible by 3, is not divisible by 9. However, all numbers divisible by 9 are also divisible by 3 because 9 is divisible by 3.


Is 5890 divisable by 9?

The trick to determining whether a number is divisible by 9 is to add all the individual numbers of the large number together and see if the result is divisible by 9. Let's add 5 + 8 + 9 + 0 = 22. Since 22 is not neatly divisible by 9, then we know that the larger 5890 is also not divisible by 9. Of course, you can divide it by 9, but there will be something left over.


Is 1110 divisible by 9?

NO. 1110 is not divisible by 9. A number is divisible by 9 if the sum of its digits is divisible by 9. 1110 = 1 + 1 + 1 + 0 = 3 (3 is not divisible by 9, thus, 1110 is not divisible by 9.)


What numbers is not divisible by 9 81 162 199 1125?

81: 8 + 1 = 9 which is divisible by 9, so 81 is divisible by 9 162: 1 + 6 + 2 = 9 which is divisible by 9, so 162 is divisible by 9 199: 1 + 9 + 9 = 19 → 1 + 9 = 10 → 1 + 0 = 1 which is not divisible by 9, so 199 is not divisible by 9. 1125: 1 + 1 + 2 + 5 = 9 which is divisible by 9, so 1125 is divisible by 9. So 199 is the only one not divisible by 9.


How can you know a number is divisible by 3?

add all the digits of the number and check if it is divisible by 3. eg-3321=3+3+2+1=9=divisible by three.the same works for 9.


Is 132 divisible by 9?

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


How many palindromes between 1000 and 9999 are divisible by 9?

think I suppost to know.


How do you know if a number can be divisible by 36?

It's very easy to test a number to see if it is divisible by 4 or by 9. If it passes both tests, then it is divisible by 4x9=36.To test for divisibility by 9, add the digits of the number. If the sum is divisible by 9, then the number is divisible by 9.To test for divisibility by 4, look at the last two digits. If they are a multiple of 4, then the number is divisible by 4.


Is 2340 divisible by 9how do you know?

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.


Is 7096 divisible by 9?

No... In order for a number to be divisible by 9, the sum of its digits must ALSO be divisible by 9. In this case, 7+0+9+6 = 22. 22 is not divisible by 9 !


Which one is NOT divisible by 9 234 345 or 567?

345 is not divisible by 9. A quick rule for checking to see if a number is divisible by 9 is to add all of the number's digits. If their sum is divisible by 9, so is the number.2+3+4 = 9, which is divisible by 9, so 234 is divisible by 9. (234/9 = 16)3+4+5 = 123, which is not divisible by 9, so 345 is not divisible by 9 (345/9 = 38 r 3)5+6+7 = 18, which is divisible by 9, so 567 is divisible by 9 (567/9 = 63)


Is 2-3-4-5-6-7-8-9-10 divisible by 810?

No, but I suspect you want to know if 810 is divisible by those numbers. Out of that group, 810 is divisible by 2, 3, 5, 6, 9 and 10


Is 345 divisible by 9?

3 + 4 + 5 = 12 which is not divisible by 9, so 345 is not divisible by 9.


What number is not divisible by 9?

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


What makes 1258 divisible by 9?

1258 isn't divisible by 9. 1251 and 1260 are. The digits of numbers that are divisible by 9 add up to a multiple of 9. If you were to stick a 2 in there somewhere, the result would be divisible by 9.


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.