الجمعة, 27.04.18
 

Can you solve the river crossing riddle? - Lisa Winer

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View full lesson: http://ed.ted.com/lessons/can-you-solve-the-riv...

As a wildfire rages through the grasslands, three lions and three wildebeest flee for their lives. To escape the inferno, they must cross over to the left bank of a crocodile-infested river. Can you help them figure out how to get across on the one raft available without losing any lives? Lisa Winer shows how.
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