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In this month’s episode of Wrong, But Useful, we’re joined by @DrSmokyFurby and his handler, Belgin Seymenoglu.

*Apologies for the poor audio quality on this call. Dave’s fault, obviously*^{1} .

We discuss:

- The Talkdust podcast
- (via Adam Atkinson): Life insurance
- Superpermutations: new record for n = 7 in the comments on a YouTube post
- @pecnut and @mscroggs have a LaTeX package that puts hats on things
- Desmos adding support for distributions and all sorts
- @mdawesmdawes’s QUIBANS website
- Dave has been playing the game The Mind
- (Via @peterrowlett), 318,000 combinations of pringles
- Dave gave a talk in Exeter and will hopefully give one in Bristol in June.
- Humble Pi by @standupmaths – book launch on March 2nd in London, tickets
~~selling fast~~ sold out. You can join the waiting list here.
- @honeypisquared (Lucy)’s new podcast – Mathematips
- We’ve been shouted out in @aap03102 (Chris Smith)’s newsletter, and on @missradders’s padlet – thanks!
- Tax – round up or not?
- Rotationally symmetric equations (@robeastaway and @peterrowlett): here, here, and Elliot’s versions here
**Puzzle feedback from last time**: Gold star for @chrishazell72: for showing that $(a-b)^2 + (b-c)^2 + (c-a)^2 + (a+b+c)^2 = 3(a^2 +b^2 + c^2)$, and that the first child is 6, younger (2yo) born when elder was 3.
**New Puzzle** (via @cmonMattTHINK): Find the line that touches $y= x^4 – x^3$ at two distinct points. Avoid calculus if possible.

* Edited 2019-02-13 to fix the title. Thanks, Adam.

## 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.