A collector of antique lamps bought two lamps, and then, discovering she was short of money, immediately had to sell them again. She sold each lamp for $600. On one of the lamps she made 20% and on the other one she lost 20%. Did she make or lose money on the whole deal? How […]

In each of the problems below, you need to determine what stamp denominations you need to provide postage from 1 cent up to the given amount, using no more than three stamps per letter.For example: which two different stamps are needed to provide postage from 1 to 7 cents using no more than three stamps

The 10″ pizza sells for $3.99 at my favourite pizza store. The store claims they have a great deal on the large 12″ pizza, which is specially priced at $ 4.31. What is the per cent discount the store is offering? Answer25The small pizza has a diameter of 10″ and therefore, an area proportional to

My bath has two taps and a plug hole. The cold tap on its own fills the bath in 15 minutes, the hot one in 6 minutes. The plug hole can drain the bath in 30 minutes with the taps off. How long will the bath take to fill if I leave both taps on

Mad Ade rides the bus to the local Hardware Store. While there he buys a fishing pole that’s 5 feet long. As Mad Ade goes to get on the bus to go home, he is stopped by the bus driver. The bus driver tells him he can’t board the bus with anything over 4 feet

Keith opened the door, hopped into the car and revved his engine. He was going to the small town exhibition.He arrived at the exhibition not long after, and began wandering over to look at the different things.At the gift shop he spent 50% of his overall money.He then went on the Dodgems and spent 20%

Suppose you are given a birthday cake which is round in shape (like a perfect circle) and you are asked to make eight equal pieces out of it by using a knife only three times. How would you proceed? AnswerUse the knife a first time to cut it across one of its diameters. Then use

King Tutankhamen died 120 years after King Eros was born. Their combined ages when they died was 100 years. King Eros died in the year 40B.C. In what year was King Tutankhamen born? AnswerHe was born 20 B.C. There were 120 years between the birth of King Eros and the death of King Tutankhamen, but

Mr and Mrs Tan have three sons. Each of their sons has two sisters. Each sister has three cousins. Each cousin has a great-grandparent.How many people are there? Answer11 people.Mr Tan, Mrs Tan, 1st son, 2nd son, 3rd son, 1st daughter, 2nd daughter. 1st cousin, 2nd cousin, 3rd cousin, and finally, the great-grandparent.

Pete Wheels is a used car salesman. He sold half his cars plus one more to his first customer of the day. To the second customer, he sold half of the remaining plus one more. To the third customer, he sold half the remainder plus one more; and to the fourth customer, he sold half

I need to get a new watch. The one I have loses exactly 20 minutes every hour. It now shows 4:00am and I know that it was correct at midnight, when I last set it. I happen to know that the watch stopped 4 hours ago, so what is the correct time now? Answer10:00am.

You have 55 coins totalling $10.00. There are more nickels than pennies, more dimes than nickels, and more quarters than dimes. How many of each coin do you have? Answer35 quarters $8.759 dimes .906 nickels .305 pennies .05$10.00

Sandy and Sue each have a whole number of dollars. I ask them how many dollars they have.Sandy says: “If Sue gives me some dollars, we’ll have the same amount of money. But if I give Sue the same number of dollars, she’ll have twice as much money as I have.”Sue says: “And if you

If 4 frogs lay 4 eggs in 4 days, and 3 ducks lay 3 eggs in 3 days, and 2 hens lay 2 eggs twice in two days, how many eggs will 1 frog, 1 duck and 1 hen lay in total from the beginning of February to the end of March in a leap

There are several students in the classroom. Some of them have 28 oranges, some have 30 and others have 31. Altogether they have 365 oranges.How many students are there? Answer365=3111+24=2813+1; therefore, there are 12 or 13 students.But if there are 13 students, they have at least 28*11+30+31=369 oranges.Therefore, there are 12 students.