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The Frog
A frog is at the bottom of a 30 meter well. Each day he
summons enough energy for one 3 meter leap up the well.
Exhausted, he then hangs there for the rest of the day. At
night, while he is asleep, he slips 2 meters backwards. How
many days does it take him to escape from the well?
Note: Assume after the first leap that his hind legs are
exactly three meters up the well. His hind legs must clear
the well for him to escape.
If you are smart then solve this...
Kindly post your answer as comments.
answer - 28
Each day he makes it up another meter, and then on the twenty seventh day he can leap three meters and climb out.