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The GCF of 15 and 18 is 3. The easiest way to find the answer is to notice that the difference between 15 and 18 is 3. The GCF of a pair of numbers can't be any greater than its difference. Since we can see that 3 is a factor of both 15 and 18, it is clearly the GCF.

Another way to find the answer is to write the prime factorizations of each number in the set.

The prime factorization of 15 is 3*5

The prime factorization of 18 is 2*3*3

So the GCF of 15 and 18 is 3.

More answers

The greatest common factor of 15 and 18 is 3.

The gcc of 18 15 and 18 would be 3.

The greatest common factor of 15 and 18 is 3.

3 x 5 = 15

3 x 6 = 18

greatest common factor of 18 and 15 is 3.

Highest common factor of 15 and 18 is 3.

3

Q: What is the greatest common factor of 18 15 and 18?

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The GCF of 9, 15, and 18 is 3. The prime factorization of 9 is 3*3. The prime factorization of 15 is 3*5 The prime factorization of 18 is 2*3*3 So the greatest common factor is 3.

The GCF is 3.

3

The GCF is 3.

The GCF is 3.

The GCF is 3.

The GCF of 3, 15, and 18 is: 3

The greatest common factor of 18 and 15 is 3. You're Welcome VDAWG