Brain Teasers & Puzzles
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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?
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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.
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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- 1,054.8K views
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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?
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A man is as old as his friend will be when the man is twice the age that the friend was
when the man’s age was half the sum of their present ages.What are their ages?
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- 1,051.1K views
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He tells you when to start,
Or remind if you forget.He smash others to break them apart,
But he is pushed by another of him.What is he ?
View SolutionSubmit Solution- 1,051.2K views
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