Something or other, whatever!

A puzzle where you have to reverse the order of two lines of numbered baubles. Invented by Ed Kirkby.

Last year I wrote about a 3D-printed puzzle I’d designed, called Seven Triples. At work we want to use this puzzle during an A-Level enrichment day, which means we need about twenty copies of…

A puzzle from the maths-fun mailing list.

An adaptation of the book Solo Noughts and Crosses

An interactive version of Puzzle 403 from Henry Ernest Dudeney's Amusements in Mathematics.

A circular version of the Lights Out puzzle. The aim of the game is to turn all of the lights off. When there is an evenly-spaced sequence of bulbs all turned off or all turned on, you may switch them all on or off by clicking two consecutive lights in the sequence.

A move in the classic Lights Out puzzle could be viewed as addition mod 2. This lets you set up a version of the puzzle where it's addition modulo something else.

Interactive versions of the early Puzzlebomb puzzle sheets. Made in Elm.

A game based on Katie Steckles's binary nail-painting puzzle.

An interactive toy for the pancake-flipping problem, to go with a post by Katie Steckles on The Aperiodical. By repeatedly flipping the top part of a stack of pancakes, can you sort them by size?

The Word Lock puzzle from February 2015's puzzlebomb

A game about putting flags in a field, made for James Grime

An interactive version of the Princess in a Castle puzzle