Bridge Crossing
There’s no time to lose! Help the 4 characters cross the bridge as fast as possible.
Can you find the true minimum time for the crossing of the four people? The question is trickier than it seems: how can you be sure you've really succeeded?
A riddle that's interesting to solve with others, to gather multiple ideas!
Explanations and Resources
This activity comes with an explanatory sheet that presents the answer and the mathematical concepts used.
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Credits: Énigmes Mathématiques Diaboliques, de Sylvain Lhullier
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