List questions from recreational-mathematics

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How many $n$-disk legal configurations are there for the Tower of Hanoi?

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Surprising limit (probability of no two coinciding pairs)

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Literary statements that are false as mathematics

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Existence of a Vampire number on the form $v = xy = a^bb^a$?

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given a positive integer $n\geq 2$, we have a positive integer $m$ such that $m+2,m+3,\dots m+n$ are composite. (TIFR exam $2012$)

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How to calculate x in formula $ y =\left( \frac{\frac{17000}{x+400}+8.5}{100}+ 1\right) x $?

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answer to iq test with colored squares

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The next number that has this property?

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A neat application of Chebyshev's inequality

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Can we identify the time if we know every angle between three hands of a watch?

Published on 15 Apr 2026 - 2:27

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Simple question that I can't solve

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A persistent difference

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Conway's Game of Life

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Is $\sum_{k=1}^{n} k^k / \sum_{k=1}^{n} k \in \mathbb{N}$ for some $n > 1$?

Published on 15 Apr 2026 - 7:47

List Question

A puzzle related to three cars which leave a town and reach another.

How many $n$-disk legal configurations are there for the Tower of Hanoi?

Surprising limit (probability of no two coinciding pairs)

Literary statements that are false as mathematics

Existence of a Vampire number on the form $v = xy = a^bb^a$?

given a positive integer $n\geq 2$, we have a positive integer $m$ such that $m+2,m+3,\dots m+n$ are composite. (TIFR exam $2012$)

How to calculate x in formula $ y =\left( \frac{\frac{17000}{x+400}+8.5}{100}+ 1\right) x $?

answer to iq test with colored squares

The next number that has this property?

A neat application of Chebyshev's inequality

Can we identify the time if we know every angle between three hands of a watch?

Simple question that I can't solve

A persistent difference

Conway's Game of Life

Is $\sum_{k=1}^{n} k^k / \sum_{k=1}^{n} k \in \mathbb{N}$ for some $n > 1$?

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