1. álgebra   psychology   physics   algebra   geometry   Hint Half-n-half Clue   2. geometria   geometry   calculus   history   physics   Half-n-half Clue   3. filosofia   biology   algebra   philosophy   trigonometry   Half-n-half Clue   4. geologia   botany   philosophy   geometry   geology   Half-n-half Clue   5. química   trigonometry   biology   chemistry   botany   Half-n-half Clue   6. zoologia   geology   zoology   astronomy   history   Half-n-half Clue   7. história   calculus   geography   chemistry   history   Half-n-half Clue