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In Episode 59 of Wrong, But Useful, we’re joined by

@el_timbre, who is Emma Bell in real life.

We discuss:

- Emma’s Roots column in Chalkdust
**Number of the podcast**: 64, because it’s pleasing, and Dave sings the 64 Zoo Lane theme, which is less so.
- Emma’s hexastix construction and the maths behind it.
- Dave has been playing Trivia Mix-up. So have we now. Apparently, 47 is the most random number.
- Dave wants to know what people should know.
- Emma runs the #mathsmatters hashtag, trying to enthuse and engage people in maths
- @nira_ch (Nira Chamberlain) won the Aperiodical Maths-Off. Dave claims to be the nice one but then fails to plug Colin’s books in Swedish.
- There were some Fields Medals. Caucher Birkar had his stolen and replaced. We ponder the logistics of getting him a replacement, much more than what he won it for.
- @mscroggs has LOOP-ed up Mathsteriods
- A lovely proof of the sum of squares.
**Puzzle feedback**: Gold stars for @alephthought and Sam Steele who each worked out that 40 cows would last ten days, and 10 cows could survive forever.
**This month’s puzzle**: Aloysius and Beatrice are flipping coins. Aloysius flips until he gets two tails in a row; Beatrice until she gets a head then a tail. How many flips, on average, does each player take?

## 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.