Brain Teasers & Puzzles
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People go round and round me Adding some lights on a string
And later underneath me They place the gifts that they bring.
What i am ?View SolutionSubmit Solution- 1,213.7K views
- 2 answers
- -1 votes
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You are on your way to visit your Friend, who lives at the end of the hill. It is his birthday, and you want to give him the cakes you have made. Between your house and his house, you have to cross 5 bridge, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake.
How many cakes do you have to leave home to make sure that you arrive at friend house with exactly two cakes?
View SolutionSubmit Solution- 1,214.8K views
- 1 answers
- 0 votes
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X wants to send a Confidential message to his friend Y in the mail.
But Z (X’s Friend), who X don’t trust, has access to all X’s mail. So X put his message in a box with a lock. But X is not allowed to send a key!
How can X send his message through securely?View SolutionSubmit Solution- 1,215.7K views
- 1 answers
- 0 votes
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There are ‘n’ coins in a line. (Suppose n is even). Two players take turns to take a coin from one of the ends of the line until there are no more coins left. The player with the larger amount of money wins.
Assume that you go first, describe an algorithm to compute the maximum amount of money you can win.
Submit Solution- 1,215.5K views
- 0 answers
- 0 votes
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Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, “Why are you smiling?”
How did he know his companion was smiling?
View SolutionSubmit Solution- 1,215.2K views
- 1 answers
- 0 votes
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How to measure exactly 4 gallon of water from 3 gallon and 5 gallon jars.
You have unlimited water supply from a running tap.
measure 4 gallon water using 3 and 4 gallon jar.View SolutionSubmit Solution- 1,216.9K views
- 1 answers
- -1 votes
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Every day, Jack arrives at the train station from work at 5 pm.
His wife leaves home in her car to meet him there at exactly 5 pm, and drives him home. One day, Jack gets to the station an hour early, and starts walking home, until his wife meets him on the road. They get home 30 minutes earlier than usual.How long was he walking?
Distances are unspecified. Speeds are unspecified, but constant.
Give a number which represents the answer in minutes.View SolutionSubmit Solution- 1,216.3K views
- 1 answers
- 0 votes
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Two trains enter a tunnel 200 miles long, traveling at 100 mph at the same time from opposite directions. As soon as they enter the tunnel a supersonic bee flying at 1000 mph starts from one train and heads toward the other one. As soon as it reaches the other one it turns around and heads back toward the first, going back and forth between the trains until the trains collide in a fiery explosion in the middle of the tunnel.
How far did the bee travel?
View SolutionSubmit Solution- 1,219.1K views
- 1 answers
- 0 votes
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You met three Monsters. One always tells the truth, other one always lies and the last one alternates between lie and truth.
Monster 1: You may ask us one question, then you must guess which dragon is which
Monster 2: He is lying. You may get three questions
Monster 3: Oh no It is definitely one question
You asked the first Monster a question
You: What would the second Monster say if you were to ask it if the 3rd dragon had been lying when it agreed with the first one that you could ask only one question
Monster 1: He’d say, “Yes, the 3rd Monster was lying”
Then you asked a second question addressing the three Monsters…… But they remained silent.
And, you solved the puzzle in 90 sec.
So, which dragon is which?Submit Solution- 1,218.3K views
- 0 answers
- 0 votes
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You have 10 identical bottles of identical marble. Each bottle contain hundred of marbles. Out of 10 bottles 09 have 1 gram of marbles but 01 bottle has marbles of weight of 1.1 gram. Given a measurement scale, how would you find the heavy bottle? You can use the scale only once.
View SolutionSubmit Solution- 1,219.2K views
- 1 answers
- 0 votes
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