When you put the 4 puzzle pieces together correctly, they form a rec- tangle with a calculation on it. What is the result of this calculation?

Denise fired a silver and a gold rocket at the same time. The rockets exploded into 20 stars in total. The gold rocket exploded into 6 more stars than the silver one. How many stars did the gold rocket explode into?

In an ice cream shop there is some money in a drawer. After 6 ice creams were sold, there were 70 euros left in the drawer. After a total of 16 ice creams were sold, there were 120 euros left in the drawer. How many euros were there in the drawer at the start?

On a tall building there are 4 fire escape ladders, as shown. The heights of 3 ladders are at their tops. What is the height of the shortest ladder?

The Koala ate some leaves from 3 branches. Each branch had 20 leaves. The Koala ate a few leaves from the first branch and then ate as many leaves from the second branch as were left on the first branch. Then it ate 2 leaves from the third branch. How many leaves in total were left on the 3 branches?

One of the five coins A, B, C, D or E shall be placed in an empty square so that there are exactly two coins in each row and in each column.

Which coin should be moved?

The members of a family of kangaroos are 2, 4, 5, 6, 8 and 10 years old.

Four of them are 22 years old when added together. How old are the other two kangaroos?