I didn't learn much from this tutorial, as most of these topics i excel at. Some questions however needed some thought and i kinda forgot the prefixes for some of the formulae.

Prefixes
1 - mon(o)
2 - di
3 - tri
4 - tetr(a)
5 - pent(a)
6 - hex(a)
7 - hept(a)
8 - oct(a)
9 - non(a)
10 - dec(a)