Brain Teasers & Puzzles
Questions Per Page:
-
A very big building in which thousand monkeys are living is lighted by thousand lamps. Every lamp is connected to a unique on/off switch, which are numbered from 1 to 1000. At some moment, all lamps are switched off. But because it is becoming darker, the monkeys would like to switch on the lights. They will do this in the following way.
Monkey 1 presses all switches that are a multiple of 1.
Monkey 2 presses all switches that are a multiple of 2.
Monkey 3 presses all switches that are a multiple of 3.
Monkey 4 presses all switches that are a multiple of 4.
Etc., etc.How many lamps are switched on after monkey 1000 pressed his switches?
And
which lamps are switched on?View SolutionSubmit Solution- 1,406.7K views
- 2 answers
- 1 votes
More puzzles to try-
What happens?
A semi truck weighing exactly 10,000 pounds gets onto a bridge that is 100 miles long. The bridge’s weight limit ...Read More »Mathematical Relationship aptitude puzzle
Find the number to replace the question mark to complete the series, provided the pair of numbers exhibits a similar ...Read More »Trick Gift Brain Teaser
Cindy opened twenty five presents. Duke opened five presents. John opened fifteen presents. Judging by the statements, can you decipher ...Read More »How many ducks are there?
Two ducks in front of a duck, two ducks behind a duck, one duck in the middle How many ducks ...Read More »Aden’s Friend
On the day before the spacecraft was to return to Earth, the Martians held a dinner party for the crew. ...Read More »Drop from tallest building riddle
if You drop him from the tallest building it is fine, but if you drop him in water he wil ...Read More »What happened?
A man is found dead in a phone booth in a pool of blood. The glass on either end of ...Read More »Finding Password puzzle
There was some system error in a mailing website because of which passwords of some clients got changed. Here is ...Read More »Count chocolate and sodas puzzle
A chocolate costs 6 rupees and a soda costs 5 rupees. If you have 32 rupees in total, how many ...Read More »Four Squares Matchsticks Puzzle
In the formation, you can see a few arranged matchsticks. Can you form three squares by moving just three matchsticks ...Read More »Coin rotating riddle
How many times does a coin rotate in rolling completely about another coin, of the same size, without slipping, whilst ...Read More »Measurement
When are there more millimetre than centimetre?Read More »Find the ages and number of nuts
Last time I visited a friend’s farm near Bangalore he gave me a bag containing 1000 peanuts. From this I ...Read More »What is the logic behind these ?
3 + 3 = 3 5 + 4 = 4 1 + 0 = 3 2 + 3 = 4 ...Read More »Born in 18th century
It was born in the 18th century, yet still live on today. Appearing on TV when he has something to ...Read More »Who is the murderer?
Role Action Block Prevents the target player from acting Redirect Change target player target. Save Protects the target player from ...Read More »Love each other
There are 08 people who like each other? Rhina likes John. Tow likes Ambi. Camer likes Brit. Jaish likes Kalli. ...Read More »Logical Number in Center
What number should come in place of the question mark below?Read More »2nd smallest number puzzle
There is 38 numbers. What is the least number of comparison needed to find the 2nd smallest out of them?Read More »Building a House
There are 5 people, who can build 5 houses in just 5 days. How long would it take 100 people ...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