Update

One of my colleagues came into my office the other day, and said to me: If p is prime and greater than 3, prove that p² – 1 is divisible by 24. Interested readers might want to try this for themselves: it’s not particularly difficult. Of course I started in…

I’ve just discovered Project Euler (from Osfameron, via Planet Haskell). This seems like great fodder for recreational mathematics and Haskell programming. Some of the simpler questions I might even co-opt for interviews (I have been known to ask the interview question “How many trailing zeroes has 100!” which has a…

27th August, 1883, 10:02am local time. This was when Krakatoa last erupted – and what an astonishing event it was. I'm currently reading Krakatoa: The Day The World Exploded and it's a fascinating read. Allow me to share with you some quite astounding details of the event. The final explosion…