1. zoologie   geometry   zoology   calculus   geography   Hint Half-n-half Clue   2. calcu   psychology   calculus   philosophy   biology   Half-n-half Clue   3. géographie   geography   geology   astronomy   geometry   Half-n-half Clue   4. algèbre   calculus   algebra   history   geography   Half-n-half Clue   5. astronomie   calculus   astronomy   algebra   botany   Half-n-half Clue   6. philosophie   geography   biology   calculus   philosophy   Half-n-half Clue   7. biologie   botany   calculus   algebra   biology   Half-n-half Clue