Martin rushed into the room bearing good news.“Joseph, your idea worked! The company liked the idea of using only two types of weights to measure heavy objects!” announced Martin, giving the letter to Joseph.“I told you so. Given any two types of weights, you can measure objects that are above a certain weight,” explained Joseph, […]
A block of wood, in the form of a cuboid 4″ x 7″ x 14″, has all its six faces painted pink. If the wooden block is cut into 392 cubes of 1″ x 1″ x 1″, how many of these would have pink paint on them? AnswerThe 1″ x 1″ x 1″ cubes that
The Boldavian navy has a rigorous training programme. In order to graduate from the naval academy, cadets must enter a pool and fight sharks. Today, a group of cadets was tested. Each cadet put on his mask, snorkel, two flippers; and armed himself with a knife. Then the cadets jumped into the pool. The sharks
Juanita was helping her mom and dad weed their garden. She noticed an interesting thing about the pea vines. No matter how tall they were, their leaves started one foot from the ground. Above that point, there was one leaf every four inches. The three vines in the garden were five, seven and eight feet
An insurance salesman knocks at the door of a house. He asks the lady about her family and wishes to know the ages of her children. She informs him that she has 3 children but does not wish to disclose information about them to a complete stranger. So, he asks for a clue.She tells him
Joe needed a rope 80 feet long. He went to a local hardware store, but found that they did not have ropes nearly that long. They had only 3′, 5′, 12′, and 20′ segments of rope. Joe would have bought only 20′ segments, as they were the cheapest per foot; unfortunately, they had such a
You have two vertical poles. One stands at 6ft. 6in, the other at 7ft. 7in. From the top of each pole tie a string to the bottom of the other pole.At what height do the two strings cross? Answer42 inches.You multiply the height of the two poles and then divide that by the sum of
Detective Grant was inspecting the scene of the crime. The 50-year-old victim, Joe, had been poisoned by a candy containing cyanide. On the table surrounding him were 9 other candies, but none of them contained cyanide. This murder was highly suspicious, because Joe had just got off a 2-yr jail sentence. Grant was very puzzled,
A fruit vendor had a basket of oranges. A customer approached him and purchased one half of the oranges plus half an orange. A second customer came and purchased one half of what he had left plus half an orange. A third customer bought one half of what was left plus half an orange, leaving
Three co-workers would like to know their average salaries.However, they are self-conscious and don’t want to tell one another their own salaries, for fear of either being ridiculed or getting their houses robbed. How can they find their average salaries, without disclosing their own salaries? AnswerGuy 1 adds a constant to his salary and tells
“I’ve always been 45 years older than your Dad,” said Grandma to young Trickle, “But now the two digits in my age, both prime, are the reverse of the two in your Dad’s age.” How old is Grandma? AnswerGrandma was 72 years old. Let the two digits be A and B. Then 10A+B-10B-A=45 so 9(A-B)=45.
Jen, Paula and Sarah had spent the week decorating an elderly neighbour’s house, for which they earned £500 among them. When it came to dividing up the money Paula claimed she had worked three times harder than Jen, and Sarah had worked twice as hard as Paula. If the money was divided fairly, how much
A man goes into a hardware store to purchase some knobs. To purchase one knob you must pay a minimum of 4 U.S. coins. Two knobs can be purchased with a minimum of 6 U.S. coins. 3 knobs require a minimum of 2 U.S. coins. How much does one knob cost? U.S. coins include: a
Tom’s birthday is exactly 4 weeks later, and today is his birthday with month and day reversed.What is Tom’s birthday? AnswerIt’s easy to say that the month and day must differ by 1.Furthermore, if their difference is 1 then the previous month must have 1 day more than 28, which is February in a leap
There is a racehorse that has won so many prestigious races; many fans come to admire him each day. One day, the owners of the horse were interviewed by a newscaster. The interviewer asked how many people there were today to admire the horse. The owner’s reply was as follows: “Twelve times the amount of
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