What you could do then is tell them that you take their overall score and divided to by 5, so if they get 10 10 10 10 10, that will be a perfect 10 score. If the students only do it once, and get a 6 , their other 4 attempts would be 0, so their final score would be 1.2 - that may motivate them to do it.
Moodle does have an average score mode, but that would only work if they do it the attempt five times.
Moodle does have an average score mode, but that would only work if they do it the attempt five times.