Mouse in a hole riddle  

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A mouse in a hole puzzle


A mouse is trapped at the bottom of a 40 meters deep hole. Each day, he crawls up 4 meters, and each night he slips back down 3 meters. 

How many days does it take the mouse to get out of the hole?

37 days.
At the rate of 1 meter per day, on the 36th day, the mouse is up to 
36 meters. On day 37, he crawls up 4 meters from 36, and he is 
up to 40 meters & out of the hole!







The  Solution

A piano


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