List questions from recreational-mathematics

Published on 15 Apr 2026 - 18:12

68

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A winning strategy for a player in a $2 \times 2011$ table.

Published on 13 Apr 2026 - 0:11

77

Views

Show that $f(x)$ always has value between 1 and 2

Published on 15 Apr 2026 - 8:11

268

Views

Interesting patterns in digits of decimal expansion of powers of 2

Published on 30 Apr 2026 - 0:10

666

Views

How can I convert an if..else if..else statement to a single formula

Published on 08 Apr 2026 - 1:45

113

Views

A "smooth" version of this function?

Published on 14 Apr 2026 - 11:48

56

Views

Expected number of balls surrounded by at least one ball of different color

Published on 13 Apr 2026 - 9:04

117

Views

Random Walk 'Snake Problem'

Published on 08 Apr 2026 - 21:02

100

Views

A simple reasoning in the geometric problem

Published on 11 Apr 2026 - 8:33

151

Views

Finding all integers $m$ and $n$ satisfying $\frac{1}{m}-\frac{1}{n}=\frac{1}{100}$

Published on 06 May 2026 - 7:28

268

Views

What's the $1$ in the compound interest formula for?

Published on 10 Apr 2026 - 17:02

81

Views

Diophantine Equation Factoring: Find all pairs of integers $(m,n)$ such that $m^2-n^2-2n=21.$

Published on 16 Apr 2026 - 3:05

803

Views

Explain the mechanism behind the "1" in the Present value calculation of money

Published on 16 Apr 2026 - 16:19

151

Views

Forbidden (co)end calculus tricks: why are they so effective?

Published on 15 Apr 2026 - 4:41

192

Views

Positive reals $a,b,c$ satisfy $2a\sqrt{a}+3b\sqrt{b}+18c\sqrt{c}=2022$ and minimize $a^3+b^3+c^3$. Find $a+b+c$.

Published on 16 Apr 2026 - 4:24

List Question

$g(2)$ for $h,g$ entire functions satisfying $(e^{h(z)}+1)(g(z)+g'(z))=1$

A winning strategy for a player in a $2 \times 2011$ table.

Show that $f(x)$ always has value between 1 and 2

Interesting patterns in digits of decimal expansion of powers of 2

How can I convert an if..else if..else statement to a single formula

A "smooth" version of this function?

Expected number of balls surrounded by at least one ball of different color

Random Walk 'Snake Problem'

A simple reasoning in the geometric problem

Finding all integers $m$ and $n$ satisfying $\frac{1}{m}-\frac{1}{n}=\frac{1}{100}$

What's the $1$ in the compound interest formula for?

Diophantine Equation Factoring: Find all pairs of integers $(m,n)$ such that $m^2-n^2-2n=21.$

Explain the mechanism behind the "1" in the Present value calculation of money

Forbidden (co)end calculus tricks: why are they so effective?

Positive reals $a,b,c$ satisfy $2a\sqrt{a}+3b\sqrt{b}+18c\sqrt{c}=2022$ and minimize $a^3+b^3+c^3$. Find $a+b+c$.

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