What is a Googly?
Complete Collection for Parents


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, teenagers 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

The pressures of being ranked
21 August 19

We are all intrigued by tables that rank people in order. But how does it feel to be the one being ranked? more...

Are New Zealanders innately Nice?
15 July 19

When I play the Greed game with teenagers, the selfishness of some of them usually means everyone misses out. But there was one exception. more...

16% of 25? Easy!
21 May 19

A regulation percentage calculation went viral recently. Last week a teenager called me a genius for being able to work this out in my head. more...

Test Match tickets for children should be FREE
13 May 19

A day at the Test match can be a wonderful experience for children. What a shame that cricket has almost given up trying to bring them in. more...

The Button That Blows Out Candles
17 April 19

Here's the story of the old man who told me about the button that blows out candles. more...

How fast would a pole vaulter hit the ground?
10 April 19

A sporting Fermi question more...

How to find a cricket pitch in a football pitch
28 February 19

The official dimensions of every adult football pitch in the world arose from quaint numbers chosen by a group of Victorians and Edwardians. more...

Recent Tweets

New series of @bbcmoreorless has started. First item is about the unreliability of A-level grades. Listen! https://t.co/E2zlpyKKCR

about 3 hours ago

@idlecuriosity @DavidHenigUK ah yes, good point.

about 21 hours ago

@idlecuriosity @DavidHenigUK they already have one of those, it's called a DRS review.

about 21 hours ago

@selvecricket Relentless 87-89 mph from all three pacemen...Archer only bowled a handful at that speed yesterday.

1 day ago

My puzzle in this week's New Scientist: "What's the flipping year?" [p.s. the edited wording is a bit confusing, a… https://t.co/xPywxkGhbW

1 day ago

Follow Rob on Twitter