This has been an interesting arithmetic task Simon came up with from his *Secrets of Sums* book, aimed at practicing long division. You had to do the division and count how many times the 1s and the 2s appeared in your calculation, then use that number a sa secret code to decipher the second part of a rude joke (see below):

# Tag Archives: Kjartan Poskitt

# The Secrets of Sums

The new favourite (Murderous) Math book is *The Secrets of Sums* by Kjartan Poskitt. It deals with simple arithmetic and Simon found it too easy when he first opened it, but then noticed that the book offers very funny and smart tricks to crack the sums, with loads of British humour.

# Where are my compasses?

There’s been a lot of drawing going on here lately. And jokes, like in the video above. Yesterday, after he got distracted while trying to draw the exact tangent of a circle, Simon said: “I went off on another tangent. To find a tangent!”

# And the winner is…

We’re back from a beautiful vacation in France and Spain, and it’s official now: All Shapes and Sizes by Murderous Maths’ Kjartan Poskitt is the winner!

And the runner up:

“Optical Illusions” by Russian mathematician Jacob Perelman.