Question

List 5 numbers that have 3, 5, and 7 as prime factors.

Answer 1

You can simply multiply all the combinations of 3,5, and 7 in pairs:

1) 3 * 5 = 15

2) 3 * 7 = 21

3) 5 * 7 = 35

Don't forget the numbers multiplied to itself:

4) 3 * 3 = 9

5) 5 * 5 = 25

6) 7 * 7 = 49