Hannes has a game board with 11 spaces. He places one coin each on eight spaces that lie next to each other. He can choose on which space to place his first coin. No matter where Hannes starts some spaces will definitely be filled. How many spaces will definitely be filled?

A mouse wants to escape a labyrinth. On her way out she is only allowed to go through each opening once at most. How many different ways can the mouse choose to go to get outside?

How many triangles are there in this picture?

Grandma stands in the courtyard calling her cat and all her chickens. After a little while 20 legs are running towards her. How many chickens does Grandma have?

A snail is at the bottom of a well 20 yards deep. Every day it climbs 7 yards and every night it slides back 4 yards. In how many days will it be out of the well?

Susi makes this pattern using ice-lolly sticks. Each stick is 5 cm long and 1 cm wide. How long is Susi’s pattern?

The giants Tim and Tom build a sandcastle and decorate it with a flag. They insert half the flagpole into the highest point of the sandcastle. The highest point of the flagpole is now 16 m above the floor, the lowest 6 m (see diagram). How high is the sandcastle?

The floor of a room is covered with equally big rectangular tiles (see picture). How long is the room?

Two equal trains, each with 31 numbered wagons, travel in opposite directions. When the wagon number 7 of a train is side by side with the wagon number 12 of the other train, which wagon is side by side with the wagon number 11?