Hello Eva, Joseph and Tim,

I fully confirm Joseph's findings.

In science and engineering, it is generally agreed that it is important for students to learn how to correctly indicate units. In some cases, it is equally important for students
to know that some quantities do not have a unit. So, for example, if a student gives 15 cm as an answer and the correct answer is actually 15, Moodle should point out to the student that their answer is incorrect.

As Joseph said, the Numerical
question intercepts the student's error, of putting a unit, in Adaptive mode, Interactive with multiple tries, etc. but not in Deferred feedback and Immediate feedback with CBM, and in the latter two modes no penalty is applied, which is a mistake
or a bug.

With the Formulas question, the student does not receive a message if he/she puts a unit when there is no unit, but he/she loses a try. In Deferred feedback and Immediate feedback with CBM, where there is only one try, the student loses the
whole point. This is a bit harsh, but it is correct.