Hello there. This section of the website is for people who've read / are reading my book 'Maths Tricks to Blow Your Mind' and would like some further information on any of the puzzles / problems / people I briefly mention. If there's anything you think I've left out, drop me an email!
A list of the most retweeted tweets of all time: LINK
The Structural Virality of online diffusion - Goel et al LINK
My popular cheese tweet LINK
Ben Stephens' percentages tweet LINK
Website claiming 90% success rate for denmark elephant trick LINK
David Acheson's excellent book 1089 and all that LINK
Huffington Post article about on/off train SATs question LINK
Nice blog post about the 'Mystery Calculator' LINK
David Copperfield clock trick LINK
James Grime's excellent paper on the Kruskal count LINK
The excellent Rob Eastaway explains Hannah's Sweets LINK
Dr Frost's Hannah's Sweets style question generator LINK
Hans Rosling: Population growth box by box LINK
Me singing about exponentially increasing love LINK
My exponential twitter thread - give it a like? LINK
The Aperiodical article about Claire Longmoor and the orchestra question LINK
Dreadful Mirror article about Mum stumped by daughter's homework LINK
Lovely proof of Chika's test by Simon Ellis LINK
The TES video with Jo Morgan & Craig Barton that largely inspired this chapter LINK
The Keane song on Chris Moyles' quiz show LINK
James Tanton elaborates on the vinculum LINK
My original discussion with CBeebies re: Apple Tree House (love you CBeebies...) LINK
Alon Amit's excellent piece about the very hard fruit equations LINK
My Collatz twitter thread. See if you can follow it all the way to Phil Collins! LINK
Ed Southall's Pink Triangle here LINK and the many solutions here LINK
Nice visualisation of the Henk Reuling circle puzzle LINK
The Catriona Agg puzzle I discuss, giver her a follow, her stuff is gold LINK
A decent piece about Gracie Cunningham, the original video is easy to google LINK
The original miracle sudoku video aka the best 25 minutes you'll ever spend LINK
And of course, the solution to the miracle sudoku in my book. I must be honest here... I never got round to fully completing it. It's really hard! So here are two attempts I've had sent to me since publication, the first by Mimi Cheung and the second by Gil Wright. I don't think they can both be right, but I'll post both here while I work out which - if either! - is correct.
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The missing pound answer: Price is p, tip is t, and change is c. P+t+c=£30, and they said they paid 27 which is p+t. But they also said they tipped the man £2, which is p+2t. So they added the tip into the price twice, not once. Going back, p+t=£27, and t+c=£30-p which means that there is no missing pound. Also another way is to imagine they split the £25 for the teapot.£25÷3=8r1. So 2 paid £8, and 1 paid £9. In conclusion, p+t+c=£30, but p+2t=£29, thus creating the puzzle
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