Answer:
Step-by-step explanation:
Factors of 90: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90.
Factors of 72: 1, 2, 3, 4, 6, 8, 9, 12, 18, 34, 36, 72.
Common factors: 1, 2, 3, 6, 18.
18 is the greatest common factor.
GCF = Greatest common factor.
The GCF of 90 and 72 is 18.
All factors of 90: 1,2,3,5,6,9,10,15,18,30,45 and 90.
All factors of 72: 1,2,3,4,6,8,9,12,18,24,36 and 72.
All common factors of 90 and 72: 18, 9, 6, 3, 2, and 1.
The greatest common factor: 18.
Hopefully this helps!
