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The Guardian - UK
The Guardian - UK
Science
Alex Bellos

Did you solve it? Are you smart enough for Mensa?

MENSA Jennifer Sally Malcolm Uri Victor Nat
Excited afro american guy in fashionable outfit, holding digital tabletStudio portrait of surprised afro american young man wearing striped top, navy blue jacket, nerd glasses and headphone, staring at camera with mouth open, holding a digital tablet in hand. Studio portrait, blue background.

Today I set you these three problems by Mensa-approved author Barry R Clarke. Here they are again with solutions.

1. Switched on

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