A snail is at the bottom of a 30-foot well. Every day it climbs up 3 feet, but every night it slips back 2 feet. On which day will the snail reach the top of the well?
28th day
Each 24-hour cycle, the snail net gains 1 foot (3 up, 2 down). After 27 days, it is at 27 feet. On the 28th day, it climbs 3 feet, reaching 30 feet and escaping before it can slip back that night.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Medium. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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