1. géométrie   physics   chemistry   astronomy   geometry   Hint Half-n-half Clue   2. botanique   algebra   geometry   botany   trigonometry   Half-n-half Clue   3. trigonométrie   algebra   astronomy   physics   trigonometry   Half-n-half Clue   4. calcu   physics   psychology   calculus   zoology   Half-n-half Clue   5. chimie   zoology   chemistry   botany   geometry   Half-n-half Clue   6. astronomie   philosophy   history   chemistry   astronomy   Half-n-half Clue   7. biologie   calculus   zoology   biology   botany   Half-n-half Clue