Question

What is the GCF of 12 and 40

Answer 1

GCF = 4

Find the prime factorization of 12

12 = 2 × 2 × 3

Find the prime factorization of 40

40 = 2 × 2 × 2 × 5

To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 2 × 2

GCF = 4