Question

List all the factors. circle the GCF12: __________16: ___________

Answer 1

EXPLANATION

Compute the prime factors of 12:

12 divides by 2: 6

6 divides by 2: 3

3 divides by 3: 1

So, prime factorization of 12 ---> 2*2*3

Compute the prime factors of 16:

16 divides by 2: 8

8 divides by 2: 4

4 divides by 2: 2

2 divides by 2: 1

So, prime factorization of 16 --> 2*2*2*2

Finally, the prime factors common to 12,16 are:

2*2 = 4