What is the common denominator of 7 6 4 3 5?

Answer 1

I think you mean least common denominator.

7 has no factors (ie, no numbers multiply together to give 7)

7 = 7

6 = 2 x 3

4 = 2 x 2

3 has no factors

3 = 3

5 has no factors

5 = 5

Altogether, we need 2 2's (to have enough for the 4), just one 3 (enough for both the 3 itself and the 6), just one 5 (enough for the 5 itself), and just one 7 (for the 7 itself).

2 x 2 x 3 x 5 x 7 = 420