Back in the olden days, Colin entered a proof without words in the Big Mathoff. It was mentioned, in passing, in a New York Times obituary of John Horton Conway.

# You're reading: Posts Tagged: Big Internet Math Off

### Geogebra to Cake in Five Steps

In the Aperiodical’s Big Internet Math-Off 2019, Becky Warren posted an entry about Geogebra’s ‘reflect object in circle’ tool (it’s the second article in the post). I enjoyed playing with the tool and, after making a few colourful designs, it occurred to me that one of them would make a great cake for the MathsJam bake-off. It would only work if the curves were accurate; sadly this would be beyond my drawing abilities, and definitely beyond my piping abilities. But with some help from 3D printing I thought I might be able to manage it.

Here are the steps I used to transfer the design to a cake.

### The Big Internet Math-Off 2019, Group 1 – Grant Sanderson vs Alaric Stephen

This is the fifth match in our group stage: from Group 1, it’s **Grant Sanderson** up against **Alaric Stephen**. 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!

### 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!

### The Big Internet Math-Off 2019, Group 3 – Vicky Neale vs Jim Propp

This is the third match in round 1: from Group 3, it’s **Vicky Neale**, vs **Jim Propp**. 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!

### The Big Internet Math-Off 2019, Group 1 – Alex Corner vs Lucy Rycroft-Smith

Welcome to The Big Internet Math-Off! Over the next month, 16 intrepid mathematicians are going to be sharing some of their favourite bits of maths in a series of head-to-head matches that will leave all of us mathematically enriched and all but one of them wishing they’d read more Martin Gardner.

The tournament starts today with our first match in group 1: Alex Corner vs Lucy Rycroft-Smith. They’ve each made a pitch for a fun bit of maths, which is below, and at the end of this post there’s a poll where you can vote for your favourite bit of maths.

If *you* know any more cool facts about either of the topics presented here, please write a comment below!

So, without further ado, let’s once more toot Gabriel’s Horn and start The Big Internet Math-Off for 2019! First up is Alex Corner.

### Second place in a single-elimination tournament

I made a silly joke, and it made me think.

You may be aware that our own Christian Lawson-Perfect is running the Big Internet Math-Off here at the Aperiodical, a single-elimination tournament with sixteen competitors. I was knocked out in round one by the brilliant Alison Kiddle. I joked that if Alison went on to win, then I’d be joint second.

Much as I like and respect @ch_nira, I’ll be rooting for @ajk_44. If she goes on to win the #BigMathOff final and is crowned The World’s Most Interesting Mathematician, then I’m joint-second, right? https://t.co/8Jt37gHFif

— Peter Rowlett (@peterrowlett) July 10, 2018

I’ve been mulling this over and I felt there was something there in thinking about the placement of the non-winners in such a tournament, so I had a play.