Which of the following pieces covers the largest number of dots in the table ?

Mary shades various shapes on square sheets of paper, as shown.

How many of these shapes have the same perimeter as she sheet of paper itself ?

Ann rides her bicycle throughout the afternoon with constant speed. At the beginning and at the end of the route, her watch shows the time, as in the diagram:

Which picture shows the position of the minute hand when Ann finishes one third of the ride ?

Matthew is catching fish. If he had caught three times as many as he actually did, he would have 12 more. How many fish did he catch ?

How many different squares of any size can you identify in the picture ?

Max, David and Peter completed in an ice cream eating contest. Max ate 6 scoops in the same time as David ate 4 scoops and Peter ate 5 scoops. Max ate 18 scoops in half an hour. How many scoops in total did they eat in half an hour together ?

From a wooden cube with side 3 cm we cut out at the corner a little cube with side 1 cm ( see picture ). What is the number of faces of the solid after cutting out such a small cube at each corner of the big cube ?

How many pairs of two-digit natural numbers have a difference equal to 50 ?

During the final game of a soccer championship the teams scored a lot of goals. Six goals were scored during the first period of the game and the guest team was leading the score at the halftime break. During the second period, the home team scored 3 goals and as a result, they won the game. How many goals did the home team score altogether ?

In the squares of the 4 x 4 board numbers are written such that the numbers in adjacent squares differ by 1. Numbers 3 and 9 appear in the table. Number 3 is in the top left corner as shown. How many different numbers appear in the table ?

Aron, Bern and Carl always lie. Each of them owns one stone, either a red stone or a green dtone.

Aron says: “ My stone is the same color as Bern’s stone”.

Bern says: “ My stone is the same color as Carl’s stone” .

Carl says: “ Exactly two of us own red stones” .

Which of the following statements is true ?

Sixty six cats signed up for the contest MISS CAT 2013. After the first round 21 cats were eliminated because they failed to catch a mouse. Of the remaining cats, 27 had stripes and 32 had one black ear. All striped cats with one black ear got to the final. What is the minimum number of finalist ?

There are four buttons in a row as shown below. Two of them show happy faces, and two of them show sad faces. If we press on a face, its expression turns to the opposite ( e.g.a happy face turns into a sad face after the touch ). In addition to this, the adjacent buttons also change their expressions. What is the least number of times you need to press a button in order to get all happy faces ?

40 boys and 28 girls stand in a circle, hand in hand, all facing inwards. Exactly 18 boys give their right hand to a girl. How many boys give their left hand to a girl ?

A stack of loads must be transported. If Ann does the job alone, it will take one hour. If Ben does the job alone, it will take two hours. How long will it take if Ann and Ben do the job together ?