Answer:

1)The factors of 32 and 48 are 1, 2, 4, 8, 16, 32 and 1, 2, 3, 4, 6, 8, 12, 16, 24, 48 .

2)The factors of 50 and 75 are 1, 2, 5, 10, 25, 50 and 1, 3, 5, 15, 25, 75

3)There are 8 common factors of 96 and 72 that are 1, 2, 3, 4, 6, 8, 12 and 24. Therefore, the highest common factor of 96 and 72 is 24.

4)factors of 70 = 1, 2, 5, 7, 10, 14, 35, 70; factors of 100 = 1, 2, 4, 5, 10, 20, 25, 50, 100)

5)The factors of 57 are 57, 19, 3, 1. The factors of 27 are 27, 9, 3, 1.