List questions from recreational-mathematics

Published on 12 Apr 2026 - 22:33

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Coin Slide from "Thinking Mathematically"

Published on 12 Apr 2026 - 11:09

96

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Is it always possible to partition data in such a way that Simpson's paradox is achieved?

Published on 14 Apr 2026 - 10:55

71

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How does adding another row and column to a matrix affect the real part of its dominant eigenvalue?

Published on 08 Apr 2026 - 9:02

101

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How to find the prime between 1,000,000 and 1,000,020

Published on 12 Apr 2026 - 1:31

65

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Does the common chord of two circles pass through this point

Published on 02 May 2026 - 10:17

88

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Show that the interval $\left[ \frac{-1+\sqrt{1+8m}}{2}, \frac{1+\sqrt{-7+8m}}{2} \right]$ contains exactly one integer

Published on 17 Apr 2026 - 0:42

195

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Prove that $e^\pi > 21$. Without a proof, you can use the two facts: $e > 2.71$ and $\pi > 3.14$.

Published on 16 Apr 2026 - 4:38

21

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Create set such that given avg/std-dev/medican we can identify the selected elements.

Published on 15 Apr 2026 - 11:41

290

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Are $3^6-6^3$ and $4^8-8^4$ the only sums of four $a^b-b^a,1\lt a\lt b$ numbers?

Published on 03 May 2026 - 15:14

241

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Five pills problem from exercises based on Feynman's lectures

Published on 17 Apr 2026 - 10:02

1.4k

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Generating (almost?) all odd numbers for the 3n + 1 problem

Published on 14 Apr 2026 - 20:26

30

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Percent Increase of Data

Published on 08 Apr 2026 - 8:01

47

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family of functions that satisfy $g(x^y+z)=g(x)^y +z$

Published on 15 Apr 2026 - 16:16

51

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How can I calculate these highly improbably odds?

Published on 15 Apr 2026 - 17:40

List Question

Can there be more than 7 consecutive repdigit primes (extended from 1)?

Coin Slide from "Thinking Mathematically"

Is it always possible to partition data in such a way that Simpson's paradox is achieved?

How does adding another row and column to a matrix affect the real part of its dominant eigenvalue?

How to find the prime between 1,000,000 and 1,000,020

Does the common chord of two circles pass through this point

Show that the interval $\left[ \frac{-1+\sqrt{1+8m}}{2}, \frac{1+\sqrt{-7+8m}}{2} \right]$ contains exactly one integer

Prove that $e^\pi > 21$. Without a proof, you can use the two facts: $e > 2.71$ and $\pi > 3.14$.

Create set such that given avg/std-dev/medican we can identify the selected elements.

Are $3^6-6^3$ and $4^8-8^4$ the only sums of four $a^b-b^a,1\lt a\lt b$ numbers?

Five pills problem from exercises based on Feynman's lectures

Generating (almost?) all odd numbers for the 3n + 1 problem

Percent Increase of Data

family of functions that satisfy $g(x^y+z)=g(x)^y +z$

How can I calculate these highly improbably odds?

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