A centipede has 25 pairs of shoes. It needs one shoe for each of its 100 feet. How many more shoes does the centipede need to buy ?

A fly has 6 legs, a spider has 8 legs. Together, 3 flies and 2 spiders have as many legs as 9 chickens and several cats. How many cats are there ?

Alice has 4 pieces of this shape: . Which picture can she not make from these four pieces ?

Kalle knows that 1111 x 1111 = 1234321. What is the answer of 1111 x 2222 ?

There are 10 islands and 12 bridges, as depicted in the figure. All bridges are open for traffic right now. What is the smallest number of bridges that must be closed in order to stop the traffic between A and B ?

Martin wants to colour the squares of the rectangle so that 1/3 of all squares are blue and half of all squares are yellow. The rest of the squares are to be coloured red.

When the car wheels make one full rotation the car moves forward by about 1.8 meters. Approximately how many kilometres will the car move forward after 10,000 full rotations of the wheels ?

There are 32 students in Mrs. Vicky’s class. Part of the students took one pencil each from the box with pencils on the teacher’s desk. Then a third of the remaining students took 3 pencils each, and there were no more pencils left in the box. How many pencils were there in the box at first ?

Three rhinoceroses Jane, Kate and Lynn go for a walk: Jane first, Kate in the middle, and Lynn-last. Jane weighs 500 kg more than Kate. Kate weighs 1000kg less than Lynn. Which of the following pictures may show Jane, Kate and Lynn in the order they walked ?

Peter and Nick are both working on “ Kangaroo” contest problems. For every two problems that Peter solves, Nick manages to solve three problems. In total, the boys solved 30 problems. How many problems did Nick solve more than Peter ?

Bob folded a piece of paper, used a hole puncher and punched exactly one hole in the folded paper. Then, he unfolded the piece of paper, which looked as shown below.

Which of the following pictures shows the lines along which Bob folded the piece of paper ?

A special die has a number on each of its six faces. The sums of the numbers on opposite faces are all equal. Five of the numbers are 5, 6, 9, 11 and 14. What number is on the sixth face ?

Tom wrote all the numbers from 1 to 20 in a row and obtained the 31-digit number

1234567891011121314151617181920

Then he deleted 24 of the 31 digits, so that the remaining number was as large as possible

Which number was it .

Peter went hiking in the moutains for 5 days. He started on Monday and his last trip was on Friday. Each day he walked 2 km more than the day before. The total distance he walked during the five days was 70 km. What distance did Peter walk on Thurday ?

In a chocolate store, one chocolate costs 3 dollars. One day the store had a deal: “ Buy two and get a third one free” and Adam decided to take 49 chocolates. How much did he pay for the chocolates ?