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If you add up all the digits in a number and the sum is a multiple of 9 then the original number is also a multiple of 9. For example; 12,167,314,839,018
1+2+1+6+7+3+1+4+8+3+9+0+1+8 = 54 = 6 x 9 therefore the original number is a multiple of 9, actually 1,351,923,871,002 x 9
Use a calculator and try to divide the number by 9. If 9 divides into the number a whole number of times then the number is a multiple of 9.
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What number is 9 a multiple of?
9 is a multiple of 3. It is 3 x 3.
What is a number divisible by 8 and 9?
A number that is divisible by both 8 and 9 must be a multiple of the least common multiple of 8 and 9, which is 72. Therefore, any number that is a multiple of 72 will be divisible by both 8 and 9. Examples of such numbers include 72, 144, 216, and so on.
How do you know if a number is divisible by 2 and 3?
If a number is even, it's divisible by two. If the digits of a number add up to a multiple of 3, it's a multiple of 3. For example, 342 is divisible by 3 because 3 + 4 + 2 = 9 and 9 is divisible by 3.
What is the third multiple of 3?
The third multiple of 3 can be calculated by multiplying 3 by 3, which equals 9. In this case, the third multiple of 3 is 9. In general, to find the nth multiple of a number, you would multiply the number by n.
What number is also a multiple of 3 and a square number?
9
