Answer:
18
Step-by-step explanation:
Factors of 36:
1, 2, 3, 4, 6, 9, 12, 18, 36
Factors of 90:
1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
---------------------------------------------------------------------------------------------------------------
The two greatest common factors are 80, we can double check by:
36 ÷ 18 = 2
90 ÷ 18 = 5
---------------------------------------------------------------------------------------------------------------
Have a good day :)
