Question

What is the GCF of 84 and 56

Answer 1

prime factorization for both numbers:

84 = 2*2*3*7

56= 2*2*2*7

prime factors: 2*2*7

answer: 28

Answer 2

The GCF is 28

Explanation:

Step 1: Find the factors of both numbers

84 → 1, 2 , 3 , 4 , 6 , 7 , 12 , 14 , 21 , 28 , 42 , 84

56 → 1 , 2 , 4 , 7 , 8 , 14 , 28 , 56

The factor that is the biggest common in both is the GCF. We see that 28 is the biggest factor that matches for both numbers.

Answer: The GCF is 28