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The Big Internet Math-Off 2019, Group 4 – Colin Beveridge vs Kyle D Evans

This is the fourth match in our group stage: from Group 4, it’s Colin Beveridge against Kyle D Evans. The pitches are below, and at the end of this post there’s a poll where you can vote for your favourite bit of maths.

Take a look at both pitches, vote for the bit of maths that made you do the loudest “Aha!”, and if you know any more cool facts about either of the topics presented here, please write a comment below!

Hannah Fry’s Hello World is Radio 4 Book of the Week

This week Radio 4 has chosen Hannah Fry’s new book Hello World as its Book of the Week. This means excerpts from the book are read out each day, and you can listen along on iPlayer Radio.

To find out what the book’s like, read this review by Colin Beveridge.

A more equitable statement of the jealous husbands puzzle

Every time I use the jealous husbands river crossing problem, I prefix it with a waffly apology about its formulation. You’ll see what I mean; here’s a standard statement of the puzzle:

Three married couples want to cross a river in a boat that is capable of holding only two people at a time, with the constraint that no woman can be in the presence of another man unless her (jealous) husband is also present. How should they cross the river with the least amount of rowing?

I’m planning to use this again next week. It’s a nice puzzle, good for exercises in problem-solving, particularly for Pólya’s “introduce suitable notation”. I wondered if there could be a better way to formulate the puzzle – one that isn’t so poorly stated in terms of gender equality and sexuality.

Carnival of Mathematics #131

Carnival of Mathematics Logo

Welcome to the 131st edition of the Carnival of Mathematics, a monthly blogging carnival which scoots its way round the internet, rounding up maths-related blog posts from the month of January.

Spoof My Proof

At the Maths Jam conference, I was delighted to chair the first ever (and possibly only) edition of Spoof My Proof, a panel show devised by Colin Beveridge and Dave Gale as a special edition of their podcast Wrong, But Useful – the show that iTunes reviewer @twentythree calls an “unassuming, gentle and informative chat on mathematics”.

Podcasts for a university mathematics student

Yesterday, I was asked by Mariana Farinha for podcasts I would recommend to a college student of Mathematics. I assume this is college in the American sense, i.e. university. Though targetting an audience is usually a broad business, so with a suitable margin of error I replied with a few, retweeted the request and a few others replied. Here are the suggestions. What would you recommend? Leave a comment!