No
Yes. You can always tell if a number is divisible by 4 by looking at the last 2 digits. In this case, 36 (4 times 9) is a multiple of 4, so 3736 is also. This is because the difference between a number and the last 2 digits (in this case, 3700) is always a multiple of 100, which is a multiple of 4.
63
It doesn't. It's not true.
No. However, one you you can tell is that the digits of a multiple of 3 always add up to another multiple of 3.
No For example, 16 is a multiple of 4 but ends in a 6. 20 is a multiple of 4, but ends in 0. To check to see if a number is a multiple of 4, see if the last two digits are a multiple of 4 or '00'. If the last two digits are a multiple of 4 or are '00', the entire number is a multiple of 4.
no, it matters with the number not digits
No. To find if a number is a factor of 3, add the number's digits. If the resulting number is a multiple of 3, then the original number is a multiple of 3. In 4339, the digits of the number added together is 19, which is not a multiple of 3.
300, 600 and 900.
A number is divisible by 3 if the sum of its digits is a multiple of 3. A number is divisible by 6 if the sum of its digits is a multiple of 3 and it's even. A number is divisible by 9 if the sum of its digits is a multiple of 9.
If the sum of the digits of a number is a multiple of 9, the number is a multiple of 9.
If the sum of the digits of a given number equals nine or a multiple of nine, nine is a factor of that number.
Yes If a numbers last two digits (assuming that it has at least two) is a multiple of 4, the whole number is also a multiple of 4. If the last two digits are 00 (assuming in this case it has at least three digits), the number is also a multiple of 4. For example, 100 and 200 are multiples of 4.