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The GCF of 18 and 63 is 9.

The factors of 63 are: 1, 3, 7, 9, 21, & 63

The factors of 18 are: 1, 2, 3, 6, 9, & 18

The GCF (AKA Greatest Common Factor) is 9.

Using prime factorization for 18 you get 2, and two 3's as your primes. For 63 you get 7, and two 3's as your primes. As the two 3's are in common you between both of the numbers, you do 3 multiplied by 3 which is 9. Therefore the gcf for 18, and 63 is 9.

The GCF is 9.

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The greatest common factor of 63 and 18 is 9

.The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question! The least multiple of a number is itself.

HCF(18, 63) = 9.

It is: 9

9.

Q: What is the greatest commonΒ factor of 18 and 63?

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