Elli draws the big square with chalk on the pavement. She starts jumping from number 1. Each time she jumps, she always jumps to a number that is 3 more than the number she is standing on. What is the largest number Elli can jump onto?
Casper has the following 7 pieces. He uses some of these pieces to fully cover this grid without overlap. He uses as many different pieces as possible. How many pieces does Casper use?
Cindy colours each region on the pattern either red, blue or yellow. She colours regions that touch each other with different colours. She colours the outer ring (region) of the pattern red. How many regions does Cindy colour red?
Dennis ties a dog 1 metre from a corner of a 7 metres by 5 metres hut as shown, using an 11 metres long leash. Dennis places 5 treats as shown. How many of the treats could the dog reach?
Lonneke builds a fence using 1 metre long poles. The picture shows a 4 metres long fence. How many poles does Lonneke need to build a 10 metres long fence?
The sum of three numbers is 50. Karin subtracts a secret number from each of these three numbers. She gets 24, 13 and 7 as the results. Which of the following is one of the original three numbers?
Amelie wants to build a crown using 10 copies of this token. When two tokens share a side, the corresponding numbers match. Four tokens have already been placed. Which number goes in the triangle marked with an X?
Farid has two types of sticks: short ones, measuring 1 cm, and long ones, measuring 3 cm. With which combination below can he make a square, without breaking or overlapping the sticks?
A standard die has 7 as the sum of the dots on opposite faces. The die is put on the first square as shown and then rolls towards the right. When it gets to the last square, what is the total number of dots on the three faces marked with question marks?
6 people each order one scoop of ice cream: 3 scoops of vanilla, 2 scoops of chocolate and 1 scoop of lemon. They use 3 cherries, 2 wafers and 1 chocolate chip as toppings, one topping on each scoop, so that no two ice creams are alike. Which combination is not possible?
The Queen tries to find out the three names of Rumpelstiltskin’s wife. She asks: “Are you called Adele Lilly Cleo?” “Are you called Adele Laura Cora?” “Are you called Abbey Laura Cleo?” Each time exactly one name and its position was right. What is the name of Rumpelstiltskin’s wife?
The teacher writes the numbers from 1 to 8 on the board, then covers them with triangles, squares and a circle. The four numbers covered by triangles sum to 10. The three numbers covered by squares sum to 20. Which number is covered by the circle?