Add the digits of the number. If that total is divisible by nine, so is the original number. Example: 12,345,678 The digits total 36. 36 is divisible by 9. So is 12,345,678.
You know that it is a multiple of 9 if it divides into 9 equally.
9
The number that can divide evenly into 6 and 9 would be 3.
The number is 9.
A factor is a number that divides exactly in another number 647 / 9 = 71.888 so answer is no 9 does divide into 639 or 648
A factor is a number that divides evenly into another number with no remainder. 3 is a factor of 9. 4 is not a factor of 9.
A factor is a number that divides evenly into another number with no remainder. 3 is a factor of 9. 4 is not a factor of 9.
If it divides evenly into the original number with no remainder, it's a factor.
1, 3, 9, 103, 309, 927
1, 3, 9, 47, 141, 423
6 divides 54 exactly to yield 9. Then 6 and 9 are factors of 54.
Check 9 out.