Device, to test whether the solution of a problem is correct, has information support with problems and solutions with code elements that can be selected using selection discs with second codes

摘要

The device has at least one information support (1), which has at least two problems (2) and the solutions (3) of the problems. The solutions have a code element (4') of a code (4). The problems are assigned to selection discs, which can be rotated with respect to the information support and project sideways from it. The selection discs have the code on their front faces. Each selection disc has a second code assigned to the first code and having code elements. The back code is displayed when all the problems have been correctly solved.