1. physique   physics   botany   geology   psychology   Hint Half-n-half Clue   2. chimie   biology   trigonometry   history   chemistry   Half-n-half Clue   3. géographie   history   astronomy   calculus   geography   Half-n-half Clue   4. histoire   trigonometry   calculus   botany   history   Half-n-half Clue   5. psychologie   calculus   psychology   geography   botany   Half-n-half Clue   6. astronomie   geography   botany   astronomy   philosophy   Half-n-half Clue   7. algèbre   geology   algebra   biology   philosophy   Half-n-half Clue