Question

List the common factors of 75, 60, and 210.

Answer 1

Factors of 75 = 1, 3, 5, 15, 25, and 75
Factors of 60 = 1, 2, 3, 4, 5, 6, 10, 12, 15, 30, and 60
Factors of 210 = 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, and 210

∴ Common factors = 1, 3, 5, and 15