The Frog’s Final Climb
brainteaser
A frog is trapped at the bottom of a well that is 30 feet deep. Every day, it climbs 3 feet up the wall. Each night, while resting, it slips 2 feet back down. The frog begins its first climb at dawn, and once it reaches the rim, it immediately hops out and cannot slide back into the well.
On which day does the frog escape?
Hints
Hint 1
Hint 2
Hint 3
Solution
Commit an attempt to unseal the proof. Write your answer — right or wrong, thinking it through is the point.
On which day does the frog escape from the well?
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