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The Guardian - US
The Guardian - US
Science
Alex Bellos

Can you solve it? Do you think like an engineer?

Pythagoras
Pythagoras of Samos around 570 BC - 510 BC a
Pythagoras of Samos around 570 BC - 510 BC a Photograph: Alamy

Today’s puzzles are about deducing the mechanisms behind two extremely puzzling objects: a practical joke cup supposedly invented by Pythagoras and a vehicle that seemingly travels the wrong way.

1. Pythagoras’s Cup

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