A snail sits at the bottom of a 30-foot well. Every day it climbs up 3 feet, but every night it slides down 2 feet. On which day will the snail finally reach the top of the well?
Day 28
The snail nets 1 foot per full 24-hour cycle. After 27 days and nights, it sits at 27 feet. On the 28th day, it climbs 3 feet, reaching 30 feet and exiting the well before sliding back.
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: Hard. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
More math riddles
Kai has 6 birds and finds 8 more. How many birds does Kai have now?
Eli has 7 carrots and finds 8 more. How many carrots does Eli have now?
Kai puts 6 leprechauns in each of 7 boxes. How many leprechauns is that altogether?
There are 22 pencils in a box and 8 are taken out. How many pencils are left?
Ida has 3 gold coins and finds 6 more. How many gold coins does Ida have now?
Max has 15 seeds and Ben has 4. How many more seeds does Max have?