How to remember (almost) everything ever
How many socks make a pair?
Maths for Mums and Dads


I've written or co-written eleven books, some of which have appeared in several languages. The majority are about the maths of everyday life, but I've also written books on cricket, memory and creative thinking.



I am Director of Maths Inspiration, a national programme of interactive lecture shows in theatres that has reached over 100,000 teenagers in the last ten years. I'm closely involved with the UK maths community, from primary schools to universities.


Talks & Radio

I give talks to adults and children that range from small interactive workshops to keynote lectures in front of several hundred. I've also done lots of radio, including BBC Radio 4, 5Live, Radio 3 and 2, but not 1 or 6...yet.

Recent Blogs

From Quidditch to the Davis Cup
30 November 15

Nothing spoils a sporting contest more than a format where the best teams don't win. more...

How do YOU remember your PIN number?
6 November 15

You aren't supposed to write your PIN number down, so how do you remember it? Here's the method I use. more...

Robshaw's Risky Decision
27 September 15

England's rugby captain was criticised for a gambling for a win and losing. Here's the maths. more...

The puzzle of the two Black Queens
4 September 15

A puzzle with an answer many people will find counterintuitive. more...

Robin the Frog Wasn't Halfway Down
24 August 15

Robin the Frog sang about how he always liked to be halfway down the stairs. But he lied. He wasn't halfway. more...

Umpire's Call
16 July 15

Across the world, statisticians search for a way to improve on cricket's controversial Duckworth Lewis method. Maybe they are looking at it the wrong way. more...

Hannah's Sweets
6 June 15

The maths GCSE question about Hannah's Sweets was tricky, but the level of media coverage was out of all proportion. more...

Ben Stokes, Joe Root and Square Roots.
1 June 15

Ben Stokes is being tipped as England's next great all-rounder. But how do you measure all-round performance? more...

Heathrow Airport and the Travelator Problem
11 May 15

A real life puzzle with an answer that isn't obvious. more...

Cheryl and the Perfect Logicians
13 April 15

The Cheryl birthday puzzle that recently went viral has opened a can of worms. more...

The Curious Popularity of Mackerel Questions
6 April 15

A trivia question that led to the pastime of Tubewhacking more...

Making things Complicated: Jardin's Principle
2 October 14

A universal syndrome that is often observed but doesn't have a name. Well it does - but hardly anyone knows it. more...

Recent Tweets

Apparently now some dispute as to whether my American mother-in-law is eligible to play for GB in the #DavisCup.

about 14 hours ago

Sorry to put a bit of a dampener on GB's historic #DavisCup win, but I see a link with Quidditch ( @simonrbriggs ?)

about 16 hours ago

RT @mathemaniac: Is it 3x333 or perhaps 3x3x111? Quick, this is a mathematical emergency!

1 day ago

Points won Davis Cup World Grp: AMurray 9.5; JMurray 1.5; Ward 1. Rest 0 Is any other team sport so dependent on one player? #daviscupfinal

1 day ago

RT @MathsInspiratn: Still a few seats available for our 1pm Cambridge show on 7th Dec, featuring @stecks @hughhunt @standupmaths and Aleksa…

2 days ago

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