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FAVOURITE NUMBER

  FAVOURITE NUMBER         &n…

9 Robert M Billie Bob Billie Bob Feb 11, 2023 6:02pm

Happy New Year 2025

Wishing a very happy: 10^(∑₏₌₀ⁿ⁼³  n·log(2²+(-1)ⁿ…

2 Robert M Robert M Robert M Jan 1, 2025 1:10am

Happy New Year 2024

My ruminations on the year 2024: If anyone really liked '23…

1 Robert M Robert M Robert M Jan 1, 2024 12:01am

A Divisibility Rule for 7

A student challenged me on a divisibility rule for 7. …

5 Robert M Robert M Robert M Oct 15, 2022 3:36pm

A holiday greeting!

Rearrange: y = Logₑ(X÷M-sa) ÷ r²

2 Robert M Robert M Robert M Dec 26, 2021 12:03pm

Hard High School Contest Problem (Euclid 2023 #10)

A recent high school contest had a rather challening proble…

1 Robert M Robert M Robert M Apr 10, 2023 12:43pm

Birthday Post 2022

My age this year is a semiperfect number!  (It can be …

2 Robert M Robert M Robert M Aug 17, 2022 11:39am

Lambert's proof that Pi is irrational.

Starts with the non-trivial (at least to me - still working…

2 Robert M Robert M Robert M Jul 3, 2022 12:33am

Ponderings on the Number 2022.

Unicode 2022 (0x7E6) is the West African letter: ߦ Looking …

3 Robert M Robert M Robert M Jan 1, 2022 12:40pm

Contest Question (multiple of 4 starting with 9)

I have been amused lately by a contest question: Find numbe…

1 Robert M Robert M Robert M Dec 5, 2021 2:20pm

Regular (stelated) icosahedra

Thinking I should build models for all of these this year.&…

1 Robert M Robert M Robert M Aug 1, 2021 12:49am

Another article worth exploring in more depth.

This article: https://getpocket.com/explore/item/the-imposs…

1 Robert M Robert M Robert M Jul 31, 2019 11:47am

How about an adult math club?!?

No one may be listening, but I'm going to put this referenc…

1 Robert M Robert M Robert M Jul 28, 2019 10:59am

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