1. filosofia   calculus   astronomy   philosophy   botany   Hint Half-n-half Clue   2. história   geology   calculus   history   chemistry   Half-n-half Clue   3. física   chemistry   physics   astronomy   geometry   Half-n-half Clue   4. psicologia   geology   psychology   botany   geometry   Half-n-half Clue   5. química   philosophy   geometry   physics   chemistry   Half-n-half Clue   6. astronomia   zoology   geology   astronomy   psychology   Half-n-half Clue   7. trigonometria   calculus   philosophy   algebra   trigonometry   Half-n-half Clue