Question

What is the GCF of 72, 90, and 162?

Answer 1

Answer: 18

Step-by-step explanation:

Factors for 72: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72

Factors for 90: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, and 90

Factors for 162: 1, 2, 3, 6, 9, 18, 27, 54, 81, and 162

Answer 2

18

Explanation:

Prime factorization of the numbers:

72 = 2 × 2 × 2 × 3 × 3

90 = 2 × 3 × 3 × 5

162 = 2 × 3 × 3 × 3 × 3

GCF(72, 90, 162)

= 2 × 3 × 3

= 18