IAS Interview Question

If it took eight men ten hours to build a wall, how long would it take four men to build it?




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* *
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=====
* * *

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Replace the question mark in the picture below.

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Amazing Facts

Gamers

In 2011, people playing Foldit, an online puzzle game about protein folding, resolved the structure of an enzyme that causes an Aids-like disease in monkeys. Researchers had been working on the problem for 13 years. The gamers solved it in three weeks.