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Even percents (Posted on 2022-05-10) Difficulty: 3 of 5
Two players decided to play many rounds of the same two-player game.

One of the players checked their winning percentages after every round and found they had winning percentages of exactly 30%, 40%, 50%, 60%, & 70% at some point, at least once and not necessarily in this order. What's the minimum number of rounds they played?

Extension: What if the set of percentages included all of 10% through 90%?

Adapted from an article in The Guardian.

No Solution Yet Submitted by Jer    
Rating: 5.0000 (2 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
soln (entirely proved) Steven Lord2022-05-18 16:07:12
Some ThoughtsSolution but not entirely provedPaul2022-05-10 14:30:32
Some Thoughtsnot necessarily minimalCharlie2022-05-10 12:50:43
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