❎ for Election Day. If you’re in the UK, don’t let this puzzle distract you from getting out to vote! The dots are equally spaced. What fraction of the square is shaded?

The area of the red square is 12. What’s the total yellow area?

Mathematics. By Catriona Agg, Catriona Agg, Used with permission.

Do you enjoy creating mathematical puzzles? We are seeking new volunteers to contribute puzzles for our journals. Please send us a direct message to find out more. @edsouthall

The green triangles are congruent. What’s the angle?

Mathematics. "What’s the area of the toppled square?" (All blocks are squares. The diagram is not to scale. The numbers represent areas of squares.) By Catriona Agg, Catriona Agg, Used with permission.

Four squares and an isosceles triangle. What’s the blue area?

The centre of the semicircle lies on the perimeter of the quarter circle. What’s the shaded area?

Out on October 5th - our collection of Headscratchers from New Scientist. The publisher has done a lovely job. You can pre-order signed copies from mathsgear.co.uk/collections/bo… Features puzzles by Katie Steckles @ajmagicmessage @sparksmaths Hugh Hunt @cshearer41 @davidb52s and many more

Headscratchers, our collection of New Scientist puzzles and the stories behind them, is published today amazon.co.uk/Headscratchers…

Hi maths teachers 👋 I have another Twitter account that I tend to use for teaching things (aiming to post one small thing a day). You might like to follow it. And if you're near Saffron Walden, why not come and work with me next year?

Had the best afternoon at Maths Inspiration. They’re so good! And Rob has given our school library a signed copy of Headscratchers! I’m having a fun time watching my colleagues arguing about Squarebot 😊

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Planning to open this with Y13 this morning 🕵️‍♀️ if you want to have a go, the puzzles are here: gchq.gov.uk/news/xmaschall… #GCHQChristmasChallenge

Apparently it's National Puzzle day! Do a puzzle of any kind and enjoy this 2020 post on some math-y ideas related to puzzles & #math puzzle sources from the internet (w/ some recent updates & link fixes). karendcampe.wordpress.com/2020/05/20/puz… #NationalPuzzle #puzzles #MTBoS #iTeachMath

Opened up my sketchbook for the first time in months, and there’s a fully-drawn puzzle in there that I’ve never posted. Now I just have to work out if it’s simply because I forgot, or if there was a good reason!

Four squares. What’s the green area?

The three smaller squares are the same size. What’s the angle?

A mystery book arrived for me at school today. I don’t think I ordered this myself… so if you have sent me a book, thank you! I’m looking forward to diving in to this 📚