List questions from problem-solving

Published on 12 Apr 2026 - 16:05

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How to represent $\max(x, y)$ in terms of absolute?

Published on 11 Apr 2026 - 3:45

2.1k

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How can we produce another geek clock with a different pair of numbers?

Published on 13 Apr 2026 - 15:24

5.9k

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Invertible Matrices are dense

Published on 02 Jun 2012 - 20:28

547

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Strategies to find the set of functions $f:\mathbb R\to\mathbb R$ satisfing the functional equation: $f(x^3)+f(y^3)=(x+y)(f(x^2)+f(y^2)-f(xy))$

Published on 11 Apr 2026 - 13:05

3.4k

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Penguin Brainteaser : 321-avoiding permutations

Published on 11 Apr 2026 - 19:58

99

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Squared Series Fourier

Published on 12 Apr 2026 - 20:44

99

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Solving Equation Difficulty (analytically or by plotting)

Published on 13 Apr 2026 - 14:21

21k

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Smallest multiple whose digits are only ones and zeros

Published on 13 Apr 2026 - 5:43

584

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Are there problems that are optimally solved by guess and check?

Published on 10 Apr 2026 - 21:47

157

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What is the algorithm for solving an equation like this one?

Published on 13 Apr 2026 - 10:30

156

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Monotonicity of Solution to $∫_0^1(x- \frac 1 g )x^{ \frac 1{gr-1} }\frac {\ln x}{(1+xgr)^2}dx = 0$

Published on 13 Jul 2012 - 14:18

1.9k

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Which is the biggest integer that divides all integers that are the product of three consecutive odd numbers?

Published on 13 Apr 2026 - 10:54

1.9k

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When chessboards meet dominoes

Published on 12 Apr 2026 - 4:47

2.3k

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An exercise from a linear algebra book (hoffman and kunze)

Published on 11 Apr 2026 - 21:33

List Question

Folding a rectangular paper sheet

How to represent $\max(x, y)$ in terms of absolute?

How can we produce another geek clock with a different pair of numbers?

Invertible Matrices are dense

Strategies to find the set of functions $f:\mathbb R\to\mathbb R$ satisfing the functional equation: $f(x^3)+f(y^3)=(x+y)(f(x^2)+f(y^2)-f(xy))$

Penguin Brainteaser : 321-avoiding permutations

Squared Series Fourier

Solving Equation Difficulty (analytically or by plotting)

Smallest multiple whose digits are only ones and zeros

Are there problems that are optimally solved by guess and check?

What is the algorithm for solving an equation like this one?

Monotonicity of Solution to $∫_0^1(x- \frac 1 g )x^{ \frac 1{gr-1} }\frac {\ln x}{(1+xgr)^2}dx = 0$

Which is the biggest integer that divides all integers that are the product of three consecutive odd numbers?

When chessboards meet dominoes

An exercise from a linear algebra book (hoffman and kunze)

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