Insight · ★★★★☆ · ~7 min
Greed for an Ace
Flip cards; win if you call the next card an ace. Best stopping rule?
by MindYourPuzzle
Cards from a standard 52-card deck are flipped one at a time. You can stop whenever you want, and you win the value of the last flipped card. The four aces are worth 1, kings 0 (worthless). You want to stop on an ace.
What is the optimal strategy? What is your expected gain?
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