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Earn +20 ptsQ: How do you know if a number is divisible by nine?
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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 the number 27000 divisible by 9?
Yes. 27,000 is evenly divisible by nine.
What are the divisibility rules of 18?
If the number is even and the sum of its digits is divisible by nine then the number is divisible by 18.
What three digit number is divisible by twelve and nine?
144 is divisible by 12 and 9.
Can you explain why a number that is divisible by 9 is also divisible by 3?
Three is a factor of nine.
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