A monkey climbs a tree 10 feet tall. Each day it climbs 3 feet but slips back 2 feet at night. How many days will it take for the monkey to reach the top?
Category: Math · Difficulty: hard
Hint: Consider the net gain per day.
Answer
8
Explanation
The monkey climbs 1 foot per day (3 up, 2 down). However, on the 7th day, it climbs to 10 feet and does not slip back. Thus, it takes 8 days to reach the top.
This is a hard math riddle — a tricky one that takes a little thought. The answer is 8.
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