1. Psychologie   psychology   geography   astronomy   calculus   Hint Half-n-half Clue   2. Philosophie   philosophy   algebra   geography   astronomy   Half-n-half Clue   3. Physik   algebra   history   physics   geometry   Half-n-half Clue   4. Geschichte   geometry   history   algebra   biology   Half-n-half Clue   5. Trigonometrie   trigonometry   history   physics   botany   Half-n-half Clue   6. Zoologie   psychology   zoology   geometry   chemistry   Half-n-half Clue   7. Chemie   botany   trigonometry   chemistry   calculus   Half-n-half Clue