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Chicken Problem from Terry Tao's blog (system of Diophantine equations)

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#elementary-number-theory #diophantine-equations #puzzle
4.1k
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There is a subset of positive integers which no computer program can print

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#elementary-set-theory #puzzle #computability
2.9k
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Puzzle: Give an algorithm for finding a frog that jumps along the number line

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#discrete-mathematics #logic #algorithms #puzzle
18.2k
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Math Riddle in Combinatorics.

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#combinatorics #puzzle
177
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Cracking license plate checksum

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#elementary-number-theory #puzzle
497
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Could one be a friend of all?

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#graph-theory #puzzle
251
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Game between 2014 card players where everyone with at least 2 cards passes a card to each of his neighbors

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#combinatorics #puzzle
887
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Algorithm to calculate powers

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#algorithms #exponentiation #puzzle
1.1k
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ABCD×E=DCBA (A,B,C,D,E is all different number in 1~9)

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#number-theory #puzzle
429
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Logical reason and truth.

Published on
#logic #puzzle
114
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Showing that two combinatorial expressions are equal

Published on
#combinatorics #puzzle #inclusion-exclusion
201
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Maximizing chance that randomly drawn numbers fill a row or column

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#probability #puzzle #maximum-likelihood
230
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Winning strategy for the 100 prisoner problem

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#combinatorics #permutations #puzzle
109
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Prove that all the numbers in the table are even.

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#discrete-mathematics #puzzle #invariance
47
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Prove an equation using the law of total expectation

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#probability #optimization #proof-explanation #recreational-mathematics #puzzle

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