“It's nearly Christmas and something terrible has happened…”

Time for the famous @mscroggs.co.uk www.mscroggs.co.uk advent calendar! Good fun — but am I too busy, or will I keep it going this year? Only time will tell!

If you like #Maths and puzzles... why not try the #Scroggs-Advent-Calendar... it's always fun to do... and there's a ravelry group... where we discuss tricky questions... and help each other our... www.ravelry.com/discuss/wool...

www.mscroggs.co.uk

It's December so apart from #AdventOfCode it's also time for @mscroggs.co.uk maths puzzle advent calendar.
Day 1 and already I'm forced to do some combinatorics. It's starting early this year! www.mscroggs.co.uk

There's also a nim style game you can play against the b(r)owser or another human on the same device.
nim-o-poly.pages.dev

The sequence to check out used in the competition is oeis.org/draft/A380990

I recently came across Schinzels theorem after exploring a puzzle problem that it directly addresses, and I felt it worthy of a blog.

This is my first ever blog, so I'm looking for as much critical feedback as possible (all re-posts welcome).

mathfuts.wordpress.com/2025/09/02/s...

For anyone who wants to play around with this idea of polyominoes limited by the number of collinear cells, then here's a little web page that supports such doodling.
playomino.pages.dev

No more* than three hexagon centers are on the same line.

(Maybe the OEIS author is @davebudd.bsky.social?)