Answer:
1. 2 x 3 x 3 x 5
2. 2 x 3 x 11
3. 2 x 2 x 13
4. Prime
5. 15
6. 4
7. 1
8. 14
9. 32 + 48 = 16(2 + 3) = 80
10. 15 + 57 = 3(5 + 10) = 72
11. 14 + 98 = 14(1 + 7) = 112
12. 55 + 88 = 11(5 + 8) = 143
13. 24
14. 42
15. 12
16. 36
17. (Work from the bottom up) 6, 4, 48