Question

Use factor trees to find the GCF of 32, 24, and 40.

Answer 1

GCF 32 24 40
^ ^ ^
2 16 2 12 2 20
^ ^ ^
2 8 2 6 2 10
^ ^ ^
2 4 2 3 2 5
^
2 2

(2) (2 & 3) (2 & 5)