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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.
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What six digit number is only divisible by two?
There is no number, no matter the number of digits, that is only divisible by 2.
How do you use divisibility rules to find at least for factors of a number?
Take the number 3336. You know it's divisible by 1 because everything is. You know it's divisible by 2 because it's even. You know it's divisible by 3 because the digits add up to a multiple of 3 and you know it's divisible by 4 because the last two digits are divisible by 4. So you've found at least four factors: 1,2,3 and 4.
How do you know if 436 is divisible by 3?
Add the digits. If the total is divisible by three, the original number is divisible by three. It's not and it's not.
How do you know when 7 is a factor of a number?
Double the last digit, subtract it from the rest. If the result is divisible by 7, the whole number is divisible by 7.
Is 78423 divisible by six explain?
No
