Exams

The exams have been tough. The results are returning. The results are the results of my studying.

I noticed something odd. The results I get for the stuff I studied for are worse than the ones that I did not study for... I hope I can find the answers to that problem.

I would be happy if I am told why my results would be bad if I study and good when I don't. Maybe it is because I did not study hard enough?