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Improving Von Neumann's Unfair Coin Solution

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#probability #puzzle #recreational-mathematics
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Probability of $5$ fair coin flips having strictly more heads than $4$ fair coin flips

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#probability #recreational-mathematics
5.1k
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Chords on a Circle

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#geometry #puzzle #recreational-mathematics
385
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Given a victory condition and a set strategy, what are the chances of winning on a given turn in a game of Magic: The Gathering?

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#probability #statistics #probability-distributions #recreational-mathematics #game-theory
123
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Mental math tip needed; moving decimal around on larger and smaller numbers?

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#recreational-mathematics
2.4k
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Expected Value of the Difference between 2 Dice

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#probability #puzzle #recreational-mathematics #dice
511
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Lightbulbs Puzzle

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#combinatorics #puzzle #recreational-mathematics
360
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Are actions in the $3\times 3\times 3$ rubik cube a group?

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#abstract-algebra #group-theory #finite-groups #recreational-mathematics #rubiks-cube
1.7k
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a big number that is obviously prime?

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#prime-numbers #arithmetic #recreational-mathematics #mental-arithmetic
531
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A cute geometry problem about angle trisectors.

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#geometry #euclidean-geometry #recreational-mathematics
3.2k
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Puzzle: A coin rolls without slipping around another coin

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#combinatorics #geometry #algebra-precalculus #puzzle #recreational-mathematics
1.1k
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Does this approach to the Collatz Conjecture make any sense.

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#recreational-mathematics
761
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showing a convex function s subharmonic

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#recreational-mathematics
3.8k
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Handshake problem

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#graph-theory #puzzle #recreational-mathematics
22.2k
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Rainbow Hats Puzzle

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#puzzle #recreational-mathematics

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