A square piece of paper of area 64cm² is folded twice as show in the picture. What is the area of the two grey sections ?

12 children were at a birthday party. The children were 6, 7, 8, 9 and 10 years old. Four of them were 6 years old. There were more 8 year olds than any other age group. What is the average age of the children ?

Ann and Bill participate in a math reality show. Each of them is secretly given one positive integer. They know that their numbers are two consecutive numbers ( for instance, Ann’s number is 7, Bill’s number is 6 ). They know only their own number, and they have to guess the number of the other person. Ann and Bill have the following discussion:

+ Ann to Bill: “ I do not know your number”

+ Bill to Ann: “I do not know your number”

+ Ann to Bill: “ Now I know your number! It is a factor of 20”

What is Ann’s number ?

In which of the figures is exactly one half of the area shaded ? 

My umbrella has the letters KANGAROO printed on the top, as shown in the picture on the right. Which of the five smaller pictures does not show my umbrella ?

There are ten ducks. Five of these ducks each lay an egg every day. They other five ducks each lay an egg every second day. How many eggs in total do the ten ducks lay in a period of 10 days ? 

The figure shows a board where each small square has an area of 4 cm2. What is the length of the thick black line ? 

The two pictures of the balanced scales show the birds Rita and Dita.

How much does Dita weigh ?

Which of the following fractions is smaller than 2 ?

Each plant in John’s garden has either 5 leaves only, or 2 leaves and 1 flower. In total, the plants have 6 flowers and 32 leaves. How many plants are there ?

Alva has 4 paper strips of the same length. She glues 2 of them together with a 10 cm overlap, and gets a strip 50 cm long.

With the other two paper strips, she wants to make a 56 cm long strip. How long should the overlap be ?

Nine flowers are planted in a row, same distance apart between any two adjacent flowers. The distance between the first and the third flower is 60 cm. What is the distance between the first and the last flower ? 

Lisa has 90 marbles. Anna has 10 more marbles than Lisa but 50 less marbles than Olle. How many marbles do they have together ?

In the picture, the rectangle ABCD is constructed from four identical rectangles. If the length of the segment BC is 1cm, what is the length of the segment AB ?

Lucy and her mother were both born in January. On March 29, 2015, Lucy adds the year of her birth, the year of her mother’s birth, her age, and her mother’s age. What is the result ?