1. The Royal Flush
The Royal Flush is the hand of the highest possible value (when wild cards are not in use). Basically, a royal flush is a straight flush made up of an ace, king, queen, jack, and ten all in the same suit.
Example: a royal flush in the suit of hearts:
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(click image for detailed examples)
4. Full House
5. Flush
6. Straight
8. Two Pairs
9. One Pair
10. High Card