### Zeckendorf cup arithmetic

My 5-minute talk at the big MathsJam conference this weekend was about some stacking cups that my daughter is too young to appreciate. Here’s the really quick version, in just over a minute:

I gave the answer at MathsJam, but the title of this post contains a big hint that should get you there with a bit of googling.

### Faces of Women in Mathematics

This is nice for International Women's Day. Filmmaker Irina Linke and mathematician ﻿Eugénie Hunsicker have put together this montage of women in maths from all around the world.

### Ditching the fifth axiom (video)

Watch geometer/topologist Caleb Ashley explain the parallel postulate on Numberphile.

### Binary, with Anne-Marie Imafidon (video)

Watch mathematician and entrepreneur Anne-Marie Imafidon MBE explain binary numbers. Anne-Marie studied for an MSc in mathematics at Oxford University, and founded the social enterprise Stemettes to encourage more women and girls into STEM careers.

### Mathematical modelling of Facebook use (video)

Watch mathematician and data scientist Jonny explain mathematical modelling of networks.

### New YouTube videos by me and James Grime

I’ve been at it again, making videos for that YouTube – this time, a collabo with James Grime. We have each posted a video on the topic of a mathematical game, as we both had things we wanted to make videos about but nobody to play with, so we met up after school and made some YouTubes.

My video features two games which *SPOILER* turn out to have maths in them. I’m also doing a bit of a giveaway on Twitter, where you can win the actual cards used in the video (I will post them out in the IRL post mail), so reply to this tweet if you want a chance to win:

James has also posted his video, which is about a different game:

### Video: How to draw an egg

Katie’s done another video! This time it’s a neat method for constructing an egg-shape, using arcs of circles.

Bonus challenge: See if you can count how many times Katie accidentally says ‘compass’ instead of ‘pair of compasses’ during the video.