List questions from recreational-mathematics

Published on 04 Mar 2015 - 1:35

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How to show that a relation is an equivalence relation given a defined relation

Published on 11 Apr 2026 - 18:44

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How to find a relation when given the distinct equivalence classes?

Published on 09 Apr 2026 - 22:52

110

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Puzzle: Players $A,B,C,D$ are in a line

Published on 08 Apr 2026 - 0:44

102

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There's addition, multiplication and exponentiation. Is there another "level" after exponentiation?

Published on 12 Apr 2026 - 23:34

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how to prove that $x^2 + y^2 =1$ is injective and surjective depending on the restrictions?

Published on 10 Mar 2015 - 21:31

74

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How to prove by induction with a set of equivalence sets?

Published on 11 Mar 2015 - 5:21

180

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What is the best way to master my algebra skills without taking an algebra class?

Published on 12 Apr 2026 - 4:02

1.7k

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Tricky 3d geometry problem

Published on 10 Apr 2026 - 22:04

46

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How to prove that A $\subseteq$B $\implies$ |A|$\le$|B|?

Published on 12 Apr 2026 - 22:01

736

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Find all possible values of $ a^3 + b^3$ if $a^2+b^2=ab=4$.

Published on 12 Apr 2026 - 2:56

198

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Conway's Game OF Life maximum periods on a set x by x game board.

Published on 12 Apr 2026 - 17:11

760

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What multiples of $d$ are still multiples of $d$ when they have their digits reversed?

Published on 11 Apr 2026 - 3:44

873

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Convergence in probability iff convergence for every bounded continuous function

Published on 10 Apr 2026 - 19:39

47

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Discrete Model Finding Stability

Published on 26 Mar 2026 - 12:42

List Question

Puzzle requiring minimizing participant's points

How to show that a relation is an equivalence relation given a defined relation

How to find a relation when given the distinct equivalence classes?

Puzzle: Players $A,B,C,D$ are in a line

There's addition, multiplication and exponentiation. Is there another "level" after exponentiation?

how to prove that $x^2 + y^2 =1$ is injective and surjective depending on the restrictions?

How to prove by induction with a set of equivalence sets?

What is the best way to master my algebra skills without taking an algebra class?

Tricky 3d geometry problem

How to prove that A $\subseteq$B $\implies$ |A|$\le$|B|?

Find all possible values of $ a^3 + b^3$ if $a^2+b^2=ab=4$.

Conway's Game OF Life maximum periods on a set x by x game board.

What multiples of $d$ are still multiples of $d$ when they have their digits reversed?

Convergence in probability iff convergence for every bounded continuous function

Discrete Model Finding Stability

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