Question

Which pair of numbers have a GCF of 2? Choose all answers that are correct. A. 10 and 2 B. 4 and 6 C. 6 and 12 D. 2 and 24

Answer 1

A.
GCF(10; 2) = 2 /factors of 10: 1, 2, 5, 10; factors of 2: 1, 2/

B.
GCF(4; 6) = 2 /factors of 4: 1, 2, 4; factors of 6: 1, 2, 3, 6/

C.
GCF(6; 12) = 6 /factors of 6: 1, 2, 3, 6; factors of 12: 1, 2, 3, 4, 6, 12/

D.
GCF(2; 24) = 2 /factors of 2: 1, 2; factors of 24: 1, 2, 3, 4, 6, 8, 12, 24/

Answer: A, B and D.