Question

What is the greatest common factor of 42, 126, and 210 ?

Answer 1

the GCF IS 42

Explanation:

The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42

The factors of 126 are: 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126

The factors of 210 are: 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210

Then the greatest common factor is 42.

Answer 2

42 i believe is correct!

Step-by-step explanation: 42 = 2 × 3 × 7; 126 = 2 × 32 × 7; and 210 = 2 × 3 × 5 × 7. So the greatest common factor is 42.