From strongest to weakest:
1
Royal Flush
A, K, Q, J, 10 all same suit
2
Straight Flush
Five consecutive cards, same suit
3
Four of a Kind
Four cards of the same rank
4
Full House
Three of a kind + a pair
5
Flush
Five cards of the same suit
6
Straight
Five consecutive cards, mixed suits
7
Three of a Kind
Three cards of the same rank
8
Two Pair
Two different pairs
9
Pair
Two cards of the same rank
10
High Card
No matching cards — highest card plays