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The number in question is divisible by 3 and 4.
A number is divisible by 3 if the sum of the digits is divisible by 3.
A number is divisible by 4 if the last two digits is divisible by 4.
963,411,024
divisible by 3 because 48 is divisible by 3 and
24 is divisible by 4, therefore 12 is a GO!
If the number is divisible by both 3 and 4.

then the number is then divisble by 12.

The divisibility rule for three is to add up all the numbers in the number- if the number is a multiple of three, then the number you started with is divisible by three. Example- 91 you do 9+1=10, so that (91) is not a multiple of three. Extra example- 21 2+1=3 and three is a multiple of three.

The divisibility rule for four is one I made myself- That is if the number is even slip it in half or divide by two, once you have done that check if the number is even- If it is, that number is a multiple of four, if not that number is not. Example- 30 30÷2=15 which is not even, so that means that 30 is not a multiple of four. Extra example- 148 148÷2=74 which is even, so 148 is a multiple of four.
If the number is divisible by 3 and four, then it is divisible by 12.

Divisible by 3-

If all of the digits in the number add up to a multiple of three, then that original number is divisible by three

Divisible by 4-

If the last two digits in a number are divisible by four, then that original number is divisible by 4.

Example: 36

Divisible by 3?

3+6= 9

9/3=3, so it is divisible by three.

Divisible by 4?

Of course, we know that 36 is divisible by 4 (36/9=4)

So 36 is divisible by 4

Therefore, we know 36 is divisible by 12

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Q: What is the divisibility for 12?
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If a number is divisible by 3, and also by 4, then it is divisible by 12 - so you might use the divisibility rules for those two numbers. Although it might be simpler just to perform the division.


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