There is not only the possibility of discovering one challenge task, but any number is imaginable. They appear only once the preceding one is completed successfully. Be careful and look out for where to find them.

# Units & rounding

Training
5

For a correct answer, the user is rewarded points. More than one wrong answer reduces the initially 100 points an exercise contributes. For every exercise, the user can try four times to enter the solution. So what is the solution here? Please try to find out. Maybe the hints will help...

# Numbers & operations

Learning
7

From transformations or not?

Which of the following equations resulted from transformations from the equation 4x - 6 = 10?

# Linear equations

Reasoning
9

Number puzzle

Which term matches the number puzzle? 3 consecutive numbers add up to 99.

# Linear equations

Reasoning
9

Video games 3

Carla and Javier have €36 between the two of them to buy video games. If Carla has twice as much money as Javier, how much money do each of them have?

# Linear functions

Modeling
7

Video games 2

Carla and Javier like to play video games. Carla has x video games and Javier has 12 video games. Together they have a total of 27 video games. Write an equation that describes this situation. Do not use blank spaces.

# Linear equations

Modeling
7