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:

• A coin game: https://twitter.com/MathsJam/status/514499732740530176
• Tangential circles: https://twitter.com/MathsJam/status/514475695649861632
• Numbers in circles: https://twitter.com/pickover/status/513877972663947266 (from @pickover)