After all the serious stuff, here’s another one of my sketches of a favourite TV presenter from way back in the past. This time it’s of Johnny Ball, the presenter of the maths and science shows Think Of A Number and Think Again in the ’70s and 80s. I think Ball started off as a presenter on Play Away before being given his own programmes. I’d always assumed until recently that he was a maths graduate, given the programmes’ subject matter. Apparently, he wasn’t. He was just a self-taught enthusiast. And he was brilliant at conveying that enthusiasm to others. Each episode of Think Of A Number explored a different topic, such as light, or flight. During the show, Ball explained the maths and science concepts with jokes, sketches, tricks and practical demonstrations. And if you wanted to know how a trick was done, all you had to do was send them an SAE and they’d tell you. I started watching it in the hope that it would help to improve my maths, which at the time was really poor. It didn’t, but the show was so amazing that I kept watching. It introduced maths concepts like the Fibonacci series, while spatial dimensions were illustrated using the mind-bending art of Max Escher. The show was performed in front of a live audience of children, whom Ball would often get to assist him in his tricks and demonstrations. Think Again was a similar series but may have been aimed at slightly older children. It still contained jokes, sketches and humour among the series stuff. I don’t know if the series are on DVD, but they’re certainly on YouTube. I watched the edition on flight a little while ago. At one point Ball talks about model flying machines, including ornithopters. These work by flapping their wings like birds. He releases a number of model planes, including an ornithopter and watches in wonder as it flaps across the studio. I was also a great fan of Think Again’s music and titles. This featured various inventions appearing and transforming into each other, beginning with a glowing nylon line drawing Ball himself, and including a Greek temple and other items, such as a spark plug transforming into a rocket. It’s by Francis Monkman, and is called ‘The Achivements of Man’. I’ve seen claims that the composer plagiarised a piece by another musician. I don’t know, but the two do sound similar. But in my view, the Think Again music is slightly better. The series also produced at least one annual, in which Ball did writing what his series did in physical performance. Naturally, it was full of jokes and pithy aphorisms. On the importance of gold, Ball coined the following piece of immortal wisdom, ‘Remember the Golden Rule: he who has all the gold, rules’. The annual starts out by showing how important numbers and maths are by imagining what it would be like if we didn’t have them. We’d have to report inflation in terms like ‘Today the cost of living rose a little bit, and the pound fell a little bit’. There were also jokes about what humans would look like to Martians. They might believe that our hair grew inside our bodies and was so long that it poked out the top of our heads. It’s childish humour, which is what is needed if you want to appeal to children.
The Thinks series ended decades ago, but Ball is still going. He has his own site on the interwebs somewhere, where he talks about maths and science. And a few years ago, I came across a book he’d written of maths puzzles. He also appeared on another programme a few months ago talking about his early life in Frenchay in Bristol.
From all this it’s very clear that he’s still got a cult following. And he deserved it. I wish there were more people like him able to communicate and spread an interest in maths and science, even to people who aren’t mathematical.


Ball’s blurb on the back cover, which also has the portrait of him I used as the basis for my drawing, runs
‘I have written this book to help you enjoy numbers, because it seems to me that’s what numbers were made for. Inside you will find jokes, puzzles and things to make and do with numbers, and any number of pictures to go with my words. There’s plenty of information about numbers, but it is never too serious because I think numbers are fun.
So now you can read about
The first people to ‘Think of a Number!”
Your body: how it measures up.
Stored energy: elastic to ballistics
From living in trees to relying on wood
Saving money and golden rules
Exploring our wet and watery world
Telling the time throughout time.
Lots of you have written to say how much you enjoy the Think of a Number television series. I hope you enjoy the book too.’ I added the pocket calculator to the sketch because it’s on the book’s cover, and because that at the time calculators were new and extremely exciting.
Here’s the theme tune for Think of a Number, which I found on Louish Waltz’s channel on YouTube. According to a comment left by John Wilks, its title is ‘Weeny Bopper’ and it was composed by Brian Bennett.
Here’s the Think Again titles and theme, from TV68’s channel on YouTube.
And here’s a video from the Beeb’s channel on YouTube from the series Bang Goes the Theory, in which Ball uses the capture/recapture technique biologists use to estimate the size of animal populations from a numbered sample to estimate the number of black cabs in London.