Brain Teasers & Puzzles
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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,Oracle
View SolutionSubmit Solution- 1,586.8K views
- 2 answers
- 0 votes
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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- 1,746.3K views
- 15 answers
- 2 votes
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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- 1,589.5K views
- 1 answers
- -1 votes
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Prove that p^2 – 1 is divisible by 24 if p is a prime number greater than 3?
View SolutionSubmit Solution- 1,579.2K views
- 1 answers
- 1 votes
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- 1 answers
- 0 votes
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- 1 answers
- 0 votes
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- 1 answers
- 0 votes
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In British Columbia you cannot take a picture of a man with a wooden leg. Why not?
Hint: Time
View SolutionSubmit Solution- 1,582.1K views
- 1 answers
- 0 votes
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- 1,578.5K views
- 1 answers
- 0 votes
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- 2 answers
- 0 votes
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