1. 幾何   trigonometry   history   chemistry   geometry   Hint Half-n-half Clue   2. 歷史   zoology   calculus   history   chemistry   Half-n-half Clue   3. 微積分   algebra   physics   biology   calculus   Half-n-half Clue   4. 物理   physics   philosophy   astronomy   calculus   Half-n-half Clue   5. 哲學   geography   philosophy   algebra   physics   Half-n-half Clue   6. 化學   history   physics   zoology   chemistry   Half-n-half Clue   7. 地質   physics   calculus   history   geology   Half-n-half Clue