Maths on the back of an Envelope
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 Number Column Puzzle
2 December 19

Some puzzles involve some lateral thinking. But when does a 'creative' answer become 'cheating'. more...

The Upside Down Swimming Calculation

The Upside Down Swimming Calculation
17 October 19

A dad and his son managed to get the right answer by making two mistakes that cancelled each other out. more...

My Mr-Barton-Maths podcast
16 September 19

Some thoughts on maths, puzzles, parenting and cricket. more...

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...

The Importance of Humour in Maths
12 July 19

GCSE examiners are discouraged from including any humour in their questions. The unintended consequence is humour-free maths lessons. more...

Recent Tweets

'Maths without a calculator' - my @Ri_Science talk from October is now online:

1 day ago

@fractality Not sure what’s up, weight of traffic I think, have got tech guys looking at it.

5 days ago

A puzzle that illustrates how one person's creativity is another person's cheating: (@slsingh @timharford)

5 days ago

The Number Column challenge - a puzzle that reveals the murky boundary between 'creativity' and 'cheating':

6 days ago

@RachelandDesign They settled down when they got off at Euston.

6 days ago

Follow Rob on Twitter