The monkey in a well
Algebra
Level
1
A monkey is at the bottom of a 30 meters well.
During the day he climbs 3 meters.
During the night he slides down 2 meters.
How many days does it need to get out of the well?
27
30
28
31
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1 solution
The monkey on the 28th day wakes up at 27 meters and climbs 3 meters to get out.