Brain Teasers & Puzzles

You have 100 doors in a row that are all initially closed. you make 100 passes by the doors starting with the first door every time. the first time through you visit every door and toggle the door (if the door is closed, you open it, if its open, you close it). the second time you only visit every 2nd door (door #2, #4, #6). the third time, every 3rd door (door #3, #6, #9), ec, until you only visit the 100th door.
What state are the doors in after the last pass? Which are open which are closed?
Puzzle asked in: Google,Adobe,Amazon,OracleView SolutionSubmit Solution 8271 views
 2 answers
 0 votes

There is a building of 100 floors
If an egg drops from the Nth floor or above it will break.
If it’s dropped from any floor below, it will not break.
You’re given 2 eggs.
Find NHow many drops you need to make?
What strategy should you adopt to minimize the number egg drops it takes to find the solution?View SolutionSubmit Solution 137514 views
 15 answers
 2 votes

You are blindfolded and 10 coins are place in front of you on table.
You are allowed to touch the coins, but can’t tell which way up they are by feel. You are told that there are 5 coins head up, and 5 coins tails up but not which ones are which.
How do you make two piles of coins each with the same number of heads up?
View SolutionSubmit Solution 10443 views
 1 answers
 0 votes

 5041 views
 1 answers
 1 votes

 5785 views
 1 answers
 0 votes

 7283 views
 1 answers
 0 votes

 3280 views
 1 answers
 0 votes

 6918 views
 1 answers
 0 votes

 3630 views
 1 answers
 0 votes

 5836 views
 2 answers
 0 votes
More puzzles to try
What is the shortest possible time to fry 3 steaks?
It takes 10 minutes to fry one steak – 5 minutes from each side. Two steaks can fit on a ...Read More »N bulbs in a circle
There are n bulbs in a circle, each bulb has one switch associated with it, on operating the switch, it ...Read More »Number Puzzle
Can you find a number based on the following information? A) Its a 4 digit number. B) Its first digit ...Read More »Disney land Racing Puzzle
Doremon organized a race in which Schinchen, jerry, Oggy, and Nobita have participated. The results of the race is as ...Read More »Dividing 17 horses in 3 sons puzzle
An Arab , who is at his death bed, called upon his three sons. He told them: “I am leaving ...Read More »UPSC number Puzzle – ? + ? + ? + ? + ? = 30
? + ? + ? + ? + ? = 30 You have to fill numbers in place of question ...Read More »Bathtub filling Riddle
A bath tub has two taps for cold and hot water to fill and a plugged hole to drain the ...Read More »Which line (A or B) continues to the other side?
Which line (A or B) continues to the other side? To many people it looks like it is A, but ...Read More »The Square Riddle
Find the number of squares in the given picture.Read More »Sentence for good and bad time – Akbar Birbal Puzzle
King Akbar asked Birbal “Write something on this wall, which if read in good times, makes you sad and if ...Read More »100 doors
There are 100 doors, all closed. In a nearby cage are 100 monkeys. The first monkey is let out, and ...Read More »Why did the waiter call the the man an Admiral?
A man walks into a restaurant and the the waiter says good day Admiral. Why did the waiter call the ...Read More »How do i survive after elevator crash puzzle
A lift is on the ground floor. There are 4 people in the lift including me. When the lift reaches ...Read More »How many are left?
A farmer has 17 sheep and all but 9 die. How many are left?Read More »50 red marbles and 50 blue marbles Puzzle
You have two jars, 50 red marbles and 50 blue marbles. A jar will be picked at random, and then ...Read More »Arrange the queens
Queens can move horizontally, vertically and diagonally any number of spaces as illustrated. One piece ‘attacks’ another if it moves ...Read More »How can you rearrange the marbles?
You have two buckets: one with only white marbles and one with only black marbles. The two buckets have the ...Read More »Months Puzzle
In a year there are 12 months. 7 months have 31 days. How many months have 28 days?Read More »City of Truth and Lies
A road is divided into two ways. One leads to City of truth and the other leads to City of ...Read More »Which is correct to say, “The yolk of the egg is white” or “The yolk of the egg are white?”
Hint :Don’t focus on verbiageRead More »