Twitter feed and site update

I’ve made some updates to this site.

The main change is the addition of a Twitter feed for MathsJam Portsmouth. You should be able to see our most recent posts in the right-hand sidebar. Please follow us @MathsJamPOR.

The other change is that I’ve managed to recover three older posts on this blog which had somehow got misplaced, and have restored them to their rightful place in our blog timeline.

MathsJam meeting 21 October 2014

The regular monthly meeting of Portsmouth MathsJam was held, as usual, at the King Street Tavern in Southsea. There was a welcome return for Andy, who has recently moved back to the region, and there were eight MathsJammers in total.

Most of the evening was spent trying various puzzles from a collection called Brain Busters that Jack had brought along. The puzzles were created by Ed Pegg Jr and you can find a pdf of them all at

(We very much recommend Ed Pegg Jr’s site It has a huge collection of maths-related puzzles and links.)

Our own Edd posed this puzzle: consider two triangles with side lengths 5, 5, 6 and 5, 5, 8 respectively. What is the ratio of their areas? Before you go digging up your old book of trigonometric formulas, there is a simple way to find the solution.

Finally, we also enjoyed seeing the photos of other MathsJammers constructing cubes for the MegaMenger project. See for more information, or search @megamenger or #megamenger on Twitter for many pictures.

MathsJam meeting 23 September 2014

Portsmouth MathsJam continues to be held on the second-to-last Tuesday of each month at the King Street Tavern, with the most recent meeting held on 23 September.

It was a fairly quiet meeting with just four of us for most of the evening, though some late arrivals boosted the number to seven. Jack brought along an Only Connect-style maths quiz and we tried several puzzles from the MathsJam twitter feed and elsewhere.

Here are tweets of some of the maths puzzles we enjoyed this month: