Ryan
There’s a scene in the classic Christmas movie “A Christmas Story” where nine-year-old Ralphie uses a secret decoder pin to decode a secret message from his favorite radio program Little Orphan Annie. My partner and I were watching this the night before Christmas Eve and as soon as I saw that...
Alaric Stephen
This will be an ongoing page that I will update as I make more progress.Centenary TrailKnown StructureA Very Straightforward Puzzle and GridCopyright PagePenguin PuzzleInside Front CoverRegex CrosswordUnknownInside Back CoverObfuscated CodePuzzle HuntUnknownResistance is FutileHow to do a...
Alaric Stephen
As with last year, mscroggs is hosting an advent calender of maths puzzles with a new puzzle each day. Putting together your answers to the 25 days you have all of the information you will need to solve a meta logic problem. He ran it last year and it is very high quality (and quite hard: I spent...
Alaric Stephen
A student showed me this puzzle and I thought it was quite neat. I have £21.45 in coins. There are four denominations of coin, one of which is £1, and each denomination has the same number of coins. What coins do I have? I'm going to go straight into analysis since this was on Radio 4 recently, so...
Alaric Stephen
This is the twelfth Ernest Dudeney puzzle that I've written up on this website and if you want to read others you can get a collection of them here. This particular one is from his tour de force: The Canterbury Puzzles, although I met it at the conference of my exam board, MEI, one year. As...
Alaric Stephen
Here’s a pleasing question from the UK Maths Challenge today. There are a collection of lines in a plane such that each line has exactly 10 intersections. Which of the following are not a possible number of lines which could have this property?1112151620?Have a go and join me for discussion of the...