The large drawing at the top of the screen shows the parts of the circle. All these drawings are arranged according to a certain rule. One drawing is missing. This drawing is marked with a "?".

Parts of the circle are shown at the top of the screen. If we put all these pieces together we will get a circle. However, one part of the circle is always missing to get a complete circle.

The bottom of the screen offers solutions to the task. Click on the drawing below that you think is the solution to the task.

The drawings shown can be rotated.

If you think that none of the images is correct, do not click on any of the images, just click on the button for the next task (bottom right).

To return to the previous task, click on the button at the bottom of the screen (bottom left). You can then cancel your choice by clicking the same or another image again.

The correct choice has a different background color than the other images (if it exists).

Work time is limited. The remaining time until the end of the task is shown to you at the bottom of the screen.

Your results will be displayed at the end of the task.