Blog posts with problems to get your brain going! You get a new problem every fortnight and the solutions are published later.
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The next problem is scheduled for late June.
You may notice some problems are missing... I'm still migrating articles from my old blog.
It's night time and 4 friends need to cross a fragile bridge, but they only have one torch. What's the order in which they should cross?
You are sunbathing when you decide to go and talk to some friends under a nearby sun umbrella, but first you want to get your feet wet in the water. What is the most efficient way to do this?