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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👉 I am a 7 letter word.
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👉 If you remove my 1st letter you can drink me
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👉Answer is really very interesting
Let us see who solves this....

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O_er_t_o_

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In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki