20 teams took part in a football league. Each team was to play exactly one match with another. How many matches were played altogether ?

Anne and Betty want to buy a book. Anne is short of 50 cents and Betty is short of 4.50 dollars. When they pool their money, the total amount is still not enough to buy the book. How much is the book ?  Assume 10 cents is the smallest unit

A theatre has 15 rows of seats. The first row has 10 seats. The second row has 3 more seats than the first row. The third row has 3 more seats than the second row and so on. How many seats are there altogether in the theatre ?

Wilfred bought a terrier at a price of 200 dollars. He then sold it for 250 dollars. He later bought it back at a price of 280 dollars and then sold it for 330 dollars. How much did Wilfred make in all ?

It takes 5 minutes to fry a pancake. One side of the pancake takes 3 minutes to fry and the other side takes only 2 minutes. Two pancakes can be placed on the frying pan at a time. What is the shortest time to fry all five pancakes ?

How many different ways are there for Eton to go to the library if he can only take the routes indicated by the arrows ?

There are two clocks in Cathy’s room. One of them is 25 minutes behind. Now it is showing 7:40. The second clock is 15 minutes ahead. What is the second clock showing now ?

In four of the five pictures, the white area is equal to the grey area. In which picture are the white area and the grey area different ?

Father hangs the laundry outside on a clothesline. He wants to use as few pegs as possible. For three towels he needs four pegs, as shown. How many pegs does he need for eleven towels ?

A math class lasts 45 minutes. Peter can solve any problem from the textbook in exactly 6 minutes. However, he needs one minutes rest after solving each problem. How many problems can Peter solve completely during one math class ?

Fifteen children are playing hide and seek. One of them is the “seeker”. After a while seven children were still hiding. How many children have already been found ?

Mike and Jake were playing darts. Each one threw three darts ( see the picture ). Who won, and by how many points did he win ?

A regular rectangular pattern on a wall was created with two kinds of tiles: grey and striped. Some tiles have fallen off the wall ( see the picture ). How many grey tiles have fallen off ?

The year 2012 is a leap year, that means there are 29 days in February. On the 15^th of March 2012, the ducklings of my grandfather are 20 days old. When did they hatch from their eggs ?

You have L-shaped tiles, each consisting of four squares as shown:  How many of the following shapes can you make by glueing together two of the given tiles ?