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The great weights problem
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Monochromatic cows
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Puzzle No. 6 - world cup medallions
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Three-digit numbers
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Are your multiplication problems real or imaginary?
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Yet more taxis!
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Science fiction, science fact: reports from the frontiers of physics
What is time? What is space? Are there parallel universes? Join Plus and FQXi on a journey exploring these...
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Putting Turing on stage
Alan Turing was a mathematician and WWII code breaker who was convicted of homosexuality in the 1950s,...
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Exploring the financial ecosystem
Deciding who is to blame and who should pay for the financial crisis will be a hot topic at the G8 next week...
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Folding the future: From origami to engineering
Back in the days before smart phones with GPS functions became ubiquitous we had maps. Remember how hard it...
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