# Wrong, But Useful: Episode 38

/podcasts/wbu38.mp3

It’s your annual Wrong But Useful Big MathsJam Special! Recorded live, so the audio is a bit shaky in parts.

- @icecolbeveridge, @reflectivemaths and @peterrowlett discuss Tantrix with some excited background chatter
- Colin interviews @teakayb (Tom Briggs in real life), who’s at MathsJam with an Enigma machine
- @pecnut and @mscroggs (Adam and Matthew) tell Colin about @chalkdustmag
- Dave and Colin review the whole shebang
- @sparksmaths (Ben Sparks) talks about his musical MathsJam experience
- A round table with Peter, Dave, @dragon_dodo (Dominika Vasilkova), @mikegibson2010 (Michael Gibson) and an audience of hundreds.

Puzzles mentioned:

- Find three rational squares in arithmetic series with common difference of 5 (@kshancock)
- Find $n$ such that $\frac{(1!)(2!)(3!)…(99!)(100!)}{n!}$ is square (@tombutton)
- What is the average value of $\sin^{100}(x)$? (@tombutton)

Link mentioned:

@christianp’s Clever Hans code.

* Special thanks to @colinthemathmo and @stecks for all the work they do to make Big MathsJam such an amazing weekend. I had a blast.