How many socks make a pair?
Maths for Mums and Dads
books

Books

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.

maths-and-puzzles

Maths

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-and-radio

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

Trams, taxes and cliff edges
3 July 14

The new Edinburgh tram has a strange connection to stamp duty more...


Fronted Adverbials and other Pointless Jargon
10 May 14

This morning I discovered some new jargon. And I'm annoyed. more...


Momentum
27 April 14

Before playing Chelsea, Liverpool won 11 League games on the trot. They had momentum. But what does that mean? more...


How to Teach Maths
4 February 14

If exams didn't exist how would I teach maths? And what maths would I teach? more...


What's the maths difference between boys and girls?
24 January 14

Segregating boys and girls for a lesson had some interesting results. more...


England could have won 5-0
6 January 14

The post mortems into England's 5-0 thrashing have begun. Yet it could have been very different. more...


When the Birthday Coincidence Goes Wrong
29 November 13

The birthday coincidence is a lovely way to demonstrate how probability can be surprising. Except when it goes wrong. more...


Three Sevenths
18 November 13

Primary school children deserve the chance to discover how to turn fractions into decimals more...


The Irksome Tuesday Boy Problem
3 November 13

The answer to this 'classic' puzzle depends entirely on the motives of the person who poses it. more...


Recent Tweets

Goodbye to Didcot's famous hyperboloid cooling towers http://t.co/o4sqqNEqJz You can re-create them using straws: http://t.co/D2ci3xSZ4K

3 days ago

Not the Thriller-in-Manilla but the Hunch-before-Lunch. @zaltzcricket's analysis of England's brainmelt at Lord's http://t.co/GvuGu30XKM

7 days ago

Nice idea, but wouldn't your child get a better feel for angles if vertical was zero and the horizontals 90 degrees? http://t.co/5NAGmCp4oB

8 days ago

The 5th day at Lord's is the best because (a) the tickets are a fair price and (b) real cricket fans outnumber corporate hospitality guests.

9 days ago

Off to Lords'. Cricket is the only sport that can last 5 days and end in a draw. But today England will win or (probably) lose.

9 days ago