Snail in Well riddle
938.7K Views
A snail is at the bottom of a well that is 20 meters in depth. Every day the snail climbs 5 meters upwards, but at night it slides 4 meters back downwards. How many days must elapse till the snail reaches the top of the well? 
Answer:
15 days must elapse.
Snail reaches the top of the well on the 16th day
Explanation:
Every day the snail climbs 5 meters upwards, but at night it slides 4 meters back downwards.
Hence, at the end of the day, the snail climbs up only by 1 meter. 1 entire day = 1 meter.
So it would require 15 entire days to reach up by 15 meters.
On the 16th day, during the day-time, the snails reaches the top of the well ( 15 + 5 = 20 ).
As the snail has already reached the top of the well, it won’t slide down at night.
Your Answer
More puzzles to try-
What happened to the remaining $1?
Three guests check into a hotel room. The clerk says the bill is $30, so each guest pays $10. Later ...Read More »How is this situation possible?
A horse travels a certain distance each day. Strangely enough, two of its legs travel 30 miles each day and ...Read More »Word made of 3 Letters
Can you make a six-letter word using the letters N, A and B ?Read More »What is the value for ‘?’
Find the replacement value for “?” Hint 1 – Start and finish at ”?” (it’s about results); Hint 2 – ...Read More »Prime number divided by 5 puzzle
Can you find out how many prime numbers that are less than 95 will leave an odd reminder when divided ...Read More »Lock & Key Riddle
You want to send a valuable object to a friend. You have a box which is more than large enough ...Read More »Turn again
It turns around once, what is out will not get in. It turns around again, what is in will not ...Read More »Most Intelligent Student
Three college toppers are summoned by the inspecting faculty. To identify the best from them, the faculty takes them into ...Read More »Items in pair
List out 15 items that are sold in pairs? Example is Photo below:Read More »Easy to lift
Easy to lift but hard to throw?Read More »Color of the bean
A pot contains 75 white beans and 150 black ones. Next to the pot is a large pile of black ...Read More »The Number Game
The product of three consecutive numbers when divided by each of them in turn, the sum of the three quotients ...Read More »Catch the Train Riddle
I drive at an average speed of 30 miles per hour to the railroad station each morning and catch my ...Read More »How was this possible?
Two horses were born at the same time, traveled the world, and then died at the same time, but did ...Read More »Throwing in the sea puzzle
If you drop a yellow hat in the Red Sea, What does it become?Read More »Snake on the Road
In a jungle where there are no street lights or any other artificial source of lights, I notice a black ...Read More »race
where can you find success before work?Read More »Form the Word
It is an eleven letter word. The first, second, third and fourth letters form a banquet’s name. The fifth, sixth ...Read More »Find the Wine
I have nine bottles of wine and one of the nine bottles is poisoned. I need to find the poisoned ...Read More »Tail long and coat brown
He can live in a house or in a shed, He comes out to play when you are in bed. ...Read More »
Accenture Interview PuzzlesAdobe Interview PuzzlesAge RiddleAkbar Birbal PuzzlesAlgorithm PuzzlesAlphabet riddleAmazon Interview PuzzlesAnalytical MathematicsAptitude PuzzleBank PuzzlesBetting PuzzlesBrain TeasersCalendar PuzzlesCards PuzzlesChess Board PuzzleChess PuzzlesChristmas Puzzlecipher PuzzleCivil Services PuzzleClock time puzzleCognizant Interview PuzzlesCoins PuzzleComputational PuzzleconundrumCoronavirus PuzzleCoupondunia Interview PuzzleCritical Thinking Puzzledata analyticsData Structure Interview QuestionsDecode PuzzleDetective PuzzlesDice PuzzleDictionary Riddlesdifficult riddleEasy Math puzzlesEasy puzzlesEinstein puzzleEnglish RiddleFamily Tree Puzzlefamous puzzleFill in the blanks riddlesFinding Killer RiddlesFlipkart interview puzzlesFunny RiddlesGeneral KnowledgeGeographical PuzzleGoogle Code Jam 2014Google Interview PuzzlesGRE PuzzleHard Puzzle
