Question

The common factors of 75, 60 and 210 are:-

• A. 1, 3, 5, 15
• B. 1, 3, 5, 15, 25
• C. 1, 3, 15, 25
• D. 3, 5, 15

Answer 1

The correct option is A 1, 3, 5, 15

Factors of 75 = 1, 3, 5, 15, 25 and 75
Factors of 60 = 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 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, 15