Last week’s puzzle was the camel and the bananas. Firstly, a moment’s thought shows that the camel can’t get any bananas to market in one go. It is 1000 km away and so the camel will eat all of its ...

Welcome to The Riddler. Every week, I offer up problems related to the things we hold dear around here: math, logic and probability. Two puzzles are presented each week: the Riddler Express for those ...

It is still relevant. It's only relevant in guiding future actions...hence the Monty Hall problem. If you pick a door, and then Monty shows you what's behind another door, what should you do? You ...

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Puzzles with counterintuitive solutions do more than challenge us. They expose how easily our fast, reflexive thinking can lead us astray. When the Monty Hall problem was first posed by Marilyn Vos ...