By using the numbers 8, 5, 3 and 1 exactly once each, and with the help of brackets and basic operations (adding, subtracting, multiplying and dividing), can you form an expression with a value of 20?
he owner of a banana plantation has a camel. He wants to transport his 3000 bananas to the market, which is located after the desert. The distance between his banana plantation and the market is about 1000 km. So he decided to take his camel to carry the bananas. The camel can carry at the maximum of 1000 bananas at a time, and it eats one banana for every kilometer it travels.
What is the largest number of bananas you can bring over to your destination?
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?
At a party, everyone shook hands with everybody else. There were 66 handshakes.
How many people were at the party?
You have 8 balls all of the same size. 7 of them weigh the same, and one of them weighs slightly more.
How can you find the ball that is heavier by using a balance and only two weighings?
You have two ropes and a lighter. Each rope has the following property: If you light one end of the rope, it will take one hour to burn to the other end. They don’t necessarily burn at a uniform rate. How can you measure a period of 45 minutes?
What digits should replace the letters M and A to make the equation MA + A = AM correct?
When the day after tomorrow is yesterday, today will be as far from Wednesday as today was from Wednesday when the day before yesterday was tomorrow. What is the day after this day?
Mr. Green, Mr. Red, and Mr. Blue were at the Soul Ace Motel having a drink. One man was wearing a red suit; one a green suit; and the other a blue suit. “Have you noticed,” said the man in the blue suit, “that although our suits have colors corresponding to our names, not one of us is wearing a suit that matches our own names?” Mr.Red looked at the other two and said, “You’re absolutely correct.” What color suit is each man wearing?