Math
posted by Kyle .
1. Multiplying to make 50. Ways to multiply with to factors. Ways to multiply with more than two factors.
2. Multiplying to make 72. Ways to multiply with two factors: Ways to multiply with more than two factors:

50 = 2*2*5*5
So, just pick any grouping of those factors where they are all used exactly once.
And of course, 1*50 = 50
Same logic with 72. List all the prime factors and then grab them in groups to make 72. 
Multiplying to make 50 it said ways to multiply with two factors: