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15
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Proof Attempt of Brouwer (via Separating Hyperplane Theorem)

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#general-topology #proof-verification #convex-analysis #recreational-mathematics #fixed-point-theorems
222
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An interesting wire-tying problem to match wire ends in as few trips as possible

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#recreational-mathematics
332
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Sailor,Monkey,Coconut answer in elaborate

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#elementary-number-theory #recreational-mathematics
203
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find a group of lowest N numbers so that no 2 pairs have the same bitwise or

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#combinatorics #recreational-mathematics #puzzle
646
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The jackal, the lion, the parrot and the giraffe - logic puzzle

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#recreational-mathematics
646
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A generalisation of Napoleon's theorem. Is this result original?

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#euclidean-geometry #recreational-mathematics
855
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Ten marbles put in a box, colour of each set by toss of a fair coin. You draw (with replacement) ten white marbles. Probability all marbles are white?

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#probability #recreational-mathematics #bayesian
493
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How many ways I can put $k$ bishops on $n\times n$ chessboard?

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#combinatorics #recreational-mathematics
3.5k
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Penrose's remark on impossible figures

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#geometry #recreational-mathematics #homology-cohomology #symmetry
168
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Lottery probability with payout system

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#probability #combinatorics #probability-distributions #recreational-mathematics
463
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Maximum number of chess moves

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#recreational-mathematics
662
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Building a box from smaller boxes

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#recreational-mathematics #combinatorial-geometry
5.1k
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How to solve problems on alligation and mixture when three types are given?

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#algebra-precalculus #arithmetic #recreational-mathematics
94
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A vessel contains $x$ amount of milk out of which $y$ amount is taken out and replaced with water $n$ times.

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#induction #arithmetic #recreational-mathematics #recursion
136
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Is there a pattern present?

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#recreational-mathematics #puzzle

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