List questions from recreational-mathematics

Published on 11 Apr 2026 - 11:53

140

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A mathematical problem which shall be linear algebra

Published on 12 Apr 2026 - 4:30

408

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Without using the proof by induction establish the formula for the simple arithmetic series

Published on 14 Apr 2026 - 5:54

94

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Passing Shillings

Published on 15 Apr 2026 - 13:28

4.6k

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When can you take the nth root of a negative number?

Published on 14 Apr 2026 - 8:19

1.2k

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What is the true relationship between impossible figures and cohomology?

Published on 12 Apr 2026 - 4:44

146

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solutions to this functional equation $f(x) = f(x^k)$

Published on 11 Apr 2026 - 4:35

82

Views

Statistics question. Drawing cards without replacement. Every time you draw a certain card draw another.

Published on 17 Apr 2026 - 3:03

465

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If $461343$ represents "Tahiti", then what island names are represented by $16343$, $38326$, and $8653$?

Published on 15 Apr 2026 - 16:13

66

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Runs of 2s in a rep digit sequence

Published on 12 Apr 2026 - 5:39

67

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Sum of $2$ factors of $12n-1$ always a new multiple of $12$ or prime (contains all $a+b=12n$)? And why?

Published on 15 Apr 2026 - 16:20

74

Views

Find the subsets of $\{ 1/k : k \in \mathbb{N} \}$ that sum to one

Published on 16 Apr 2026 - 6:13

3.6k

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$2^n \times 2^n$ Chessboard Covering minus $1$ square

Published on 16 Apr 2026 - 5:22

140

Views

Repeated digit multiplication: How often does it lead to zero?

Published on 12 Apr 2026 - 13:29

164

Views

Implicit differentiation for $x^2+y^2-x^2y^2=1$ while the slope of the curve must be ($0$)

Published on 17 Apr 2026 - 14:11

List Question

A mathematical riddle

A mathematical problem which shall be linear algebra

Without using the proof by induction establish the formula for the simple arithmetic series

Passing Shillings

When can you take the nth root of a negative number?

What is the true relationship between impossible figures and cohomology?

solutions to this functional equation $f(x) = f(x^k)$

Statistics question. Drawing cards without replacement. Every time you draw a certain card draw another.

If $461343$ represents "Tahiti", then what island names are represented by $16343$, $38326$, and $8653$?

Runs of 2s in a rep digit sequence

Sum of $2$ factors of $12n-1$ always a new multiple of $12$ or prime (contains all $a+b=12n$)? And why?

Find the subsets of $\{ 1/k : k \in \mathbb{N} \}$ that sum to one

$2^n \times 2^n$ Chessboard Covering minus $1$ square

Repeated digit multiplication: How often does it lead to zero?

Implicit differentiation for $x^2+y^2-x^2y^2=1$ while the slope of the curve must be ($0$)

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