At one time, the Canadian and US dollars were discounted by 10 cents on each side of the border (i.e. a Canadian dollar was worth 90 US cents in the US, and a US dollar was worth 90 Canadian cents in Canada). A man walks into a bar on the US side of the border, […]
Pretend you have two faucets for your shower, one that releases hot water and one that releases cold water, but at varying pressures. If the hot water is 105 degrees Fahrenheit and the cold water is 45 degrees Fahrenheit, and you could rotate the faucet at most 360 degrees, how much would you have to
When I add 6 times my age 6 years from now to 7 times my age 7 years from now, I get 14 times my current age. How old will I be 3 years from now? Answer88
Matthew walks up and down a hill which is three kilometres each way. His dog, being slower, walks at half the speed. When Matthew reaches the top of the hill, he turns around and walks down to meet his dog part way. Matthew continues walking to the bottom of the hill maintaining his speed. The
Grandpa Jones says:“My son Adam is 24 years younger than I and 35 years older than my grandson, Joey. Together our total ages add up to 100.”Can you figure out the age of each one of them? AnswerGrandpa Jones was 24 when Adam was born and Joey was born 35 years later, so Grandpa has
Sally and Anna took turns multiplying numbers. Sally picked the number four. Anna multiplied that by 4 to get 16. Sally multiplied that by 4 to get 64. Anna multiplied that by 4 to get 256.After going back and forth several times, one of them got the number 1,048,576. Who came up with that number—Sally
You are at a birthday party and the cake is brought in. The birthday candles on the cake are in a pattern: red, yellow, red, yellow, blue, red, yellow, blue, green. The pattern continues, adding pink, orange, purple and white candles.How many candles are on the cake in all? Answer The Pattern: red, yellow,red, yellow,
Mr. and Mrs. Crazy recently had their concert, and they wanted to know how much their total income was. After calculating that they earned $95, they figured out that 100 people attended their concert. If each child paid 50 cents, each pensioner paid $2.50, and adults paid $10 each, how many children, pensioners, and adults
About 2000 B.C. there lived Ahmes, a royal secretary and mathematician of the Pharaoh Amenemhat III. In 1853, an Englishman Rhind found one of Ahmes’s papyruses near the temple of Ramses II in Thebes. The papyrus is a rectangle 33 cm wide and about 5 m long. There is the following Mathematical brain teaser on
Outside the lost city of Xaitec, archaeologists have noticed three rings of large stones, each with a straight line of stones beside it. Twins Sari and Devon have been asked by the chief archaeologist to see whether there may be a connection between the rings and the lines. The twins decide to determine the diameters
There is a certain club which is for men only. There are 600 men who belong to this club and 5% of these men wear one ear-ring. Of the other 95% membership, half wear two ear-rings and the other half wear none. How many ear-rings are being worn in this club? AnswerSix hundred. We know
Josh is writing a book. He starts on page 1. When he finished, he used a total of 228 digits. How many pages does he have? Answer112 pages.
A priest sent a courier from Rome to Venice to reach Venice in 7 days. At the same time, the Mayor of Venice sent a courier to Rome to reach Rome in 9 days. The distance was 250 miles. In how many days will they meet?HintThe speeds of the couriers are 250/7 and 250/9 AnswerThe
A girl is twice as old as her brother and half as old as her father. In 22 years, her brother will be half as old as his father. How old is the daughter now? AnswerShe is 22. Her brother is 11 and her father is 44. In 22 years, her brother would be 33
Michael has five bags of candies to give out. Four of the bags have a total of 84 candies. The fifth contains four candies less than the average of the five bags. How many candies are in the fifth bag? AnswerSixteen