Wrong, But Useful: Episode 38


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

  1. @icecolbeveridge, @reflectivemaths and @peterrowlett discuss Tantrix with some excited background chatter
  2. Colin interviews @teakayb (Tom Briggs in real life), who’s at MathsJam with an Enigma machine
  3. @pecnut and @mscroggs (Adam and Matthew) tell Colin about @chalkdustmag
  4. Dave and Colin review the whole shebang
  5. @sparksmaths (Ben Sparks) talks about his musical MathsJam experience
  6. 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.


Colin is a Weymouth maths tutor, author of several Maths For Dummies books and A-level maths guides. He started Flying Colours Maths in 2008. He lives with an espresso pot and nothing to prove.


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Where do you teach?

I teach in my home in Abbotsbury Road, Weymouth.

It's a 15-minute walk from Weymouth station, and it's on bus routes 3, 8 and X53. On-road parking is available nearby.

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