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