Logic puzzles, riddles, math puzzles and brainteasers - pzzls.com

Vandaag is het 21 April 2018

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Building a wall - logic puzzle

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To protect his country a king decided to build a wall made out of stone along the border. The wall had to be 3 meters thick and 5 meters high. The border of the country has a length of 500 kilometers. Assuming that one cubic meter of stone weights about 3000 kg, how much heavier becomes the earth by building this wall?

Pay problem - math puzzle

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Bob buys two things in a shop. With his pocket calculator he calculates in advance what he has to pay: 5.25 dollars. But what he does not notice is that he pressed the division instead of the addition button. At the desk he is not surprised if he hears that he has to pay 5.25 dollars. What is the price of the two things Bob has bought?

Put the coin in the bottle - logic puzzle

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Imagine that you need to put a coin into an empty bottle and then insert a cork into the neck.

Is there a way to remove the coin without taking out the cork or breaking the bottle?