Cả gà và chó có 110 chân. Tìm số gà và chó biết rằng gà nhiều hơn chó 37 con.

Cả gà và chó có 120 chân. Tìm số gà và chó biết rằng gà nhiều hơn chó 9 con ?

Cả gà và chó có 122 chân. Tìm số gà và chó biết rằng gà nhiều hơn chó 19 con ?

Cả gà và chó có 58 chân. Tìm số gà và chó biết rằng gà nhiều hơn chó 2 con.

My unbrella has KANGAROO written on top, as shown on the picture

Which of the following pictures below also shows my umbrella ?

Follow the arrows and find the result

In the figure, we see an island with a funny shape and several frogs.

How many of these frogs are sitting on the island ?

Dana is saving up for skates. She puts 2 dollars in her piggy bank every Wednesday and Friday. How many dollars will she save up in five weeks ?

Eric had 10 equal metal strips.

He crewed pairs of them together into five long strips as shown below.

Which strip is the longest ?

A number has two digits. The product of the digits this number is 15. What is the sum of the digits of this number ?

We want to connect the dots on the circle using line segments. We start at dot 1 and correct every second dot on the circle until we are back at the number 1. The first two line segments are drawn already. What figure do we get in the end ?

The picture shows the back side of the puzzle.

Which of the following pieces ( seen from the front side ) is the missing piece ?

Basil wants to cut the shape in Figure 1 into identical triangles as in Figure 2

How many triangles will he get ?

Jack built a cube using 27 small cubes colored either grey or white ( see the figure ). No two of the small cubes, with the same color, have a common face. How many white cubes did Jack use ?

Betty marked 8 red points on a straight line. Then she put a blue point in each space between two neighbouring red points. Finally, Betty put a green point in each space between two neighbouring blue and red points. How many points did Betty mark in total ?

In a speed skating competition, 10 races reached the final. Tom beat three racers more than beat him. Which place did Tom end up in ?

Josip has four toys – a car, a doll, a ball and a spaceship

He wants to arrang the toys in a row on a shelf. Both the spaceship ad the doll have to be next to the car. In how many ways can he arrange the toys so that the condition is fulfilled ?

Peter rides a bicycle in a park with bike paths as shown in the figure. He starts from the Start line in the direction of the arrow. At the first crossroad he turns right, then at the next crossroad he turns left, the right again, then left again and so on, in that order. What is the sign which he will not pass ?

There are 5 ladybugs shown in the figure. Two ladybugs are friends with each other if the numbers of spots that they have differ exactly by 1. On Kangaroo Day, each of the ladybugs sent one text message to each of their friends. How many text messages were sent ?

A retangle is divided into exactly 12 identical squares arranged in three rows. What is the perimeter of the rectangle, if the perimeter of one little square is 12 cm ?v

Luisa wanted to fold a cube from a piece of paper. By mistake she drew and cut 7 squares on her sheet instead of 6 squares

Which square must she remove so that the figure remains connected and Luisa can fold a cube from it ?

The numbers 2, 3, 5, 6 and 7 are written in the squares of the cross ( see the figure ) so that the sum of the numbers in the row is equal to the sum of the numbers in the column. Which of the numbers can be written in the centre square of the cross ?

To cook an elixir a witch needs five types of herbs exactly in the amounts weighed by the scales in the picture. The witch knows that she needs to put 5 grams of sage into the elixir. How many grams of hibiscus does she have to use ? ( The weight of the scales is irrelevant. )

Three ropes are laid down on the floor as shown.

You can make one big, complete loop by adding three other pieces of rope to these three. Which of the following sets of rope pieces shown below will make one pig loop ?

In the dotted sheet below, the distances, both horizontally and vertically, between every two neighbouring points are equal.

Ann drew all possible squares by connecting four of the points. How many different values can the area of the squares take ?