An opponent may be attempting to form particular combinations if they routinely pick up particular types of cards. In such a situation, it might be prudent to hold off on discarding cards that worummy enjoyuld enable them to finish their sets and runs. Conversely, it might be safer to discard cards that your opponent is not displaying any interest in since it is less likely that other players will need them. Jokers can be any other card in the deck when used as wild cards in 777 Rummy. Because of this, they are very useful for forming multiples of seven or sets & runs that add up to seven.