It is because 3 is a factor of 9.
So if 9 is a factor of some number X, then X = k*9 for the factor pair 9 and k
But X = k*9 = k*(3*3) = (k*3)*3 so that X is k*3 times 3 ie it is a multiple of 3.
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If one number is a factor of another number, the greatest common factor will be the lesser number. Example: 3 and 9 3 is a factor of 9 3 is a factor of 3 There can be no higher factor of a number than the number itself. Therefore, the GCF of 3 and 9 is 3.
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.
Both 6 and 9 have the number 3 as a prime factor. 6 = 3 x 2 9 = 3 x 3
Yes, every number that's divisible by 9 is divisible by 3
9 is not a prime factor, but it does have one prime factor, which is three. Prime factors are factors of a number that are prime.