# 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
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)

@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

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.