Bite-sized brain teaser to solve in a minute or less.
The Stubborn Snail
Category: Math, Classic Puzzle
A snail is at the bottom of a 10-foot deep well. Each day it climbs 3 feet but slides down 2 feet at night. How many days will it take for the snail to get out of the well?
Solution
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Net gain per full day = 3 feet - 2 feet = 1 foot. After 7 days, snail has climbed to 7 feet. On Day 8, it climbs 3 feet to reach 10 feet and escapes before sliding back. Answer: It will take 8 days for the snail to get out of the well. |
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