1. álgebra   physics   psychology   geology   algebra   Hint Half-n-half Clue   2. ischisleniye   history   trigonometry   zoology   calculus   Half-n-half Clue   3. biologiya   calculus   astronomy   trigonometry   biology   Half-n-half Clue   4. astronomiya   psychology   algebra   calculus   astronomy   Half-n-half Clue   5. geometriya   botany   geometry   history   philosophy   Half-n-half Clue   6. himiya   chemistry   geology   zoology   botany   Half-n-half Clue   7. botanika   botany   psychology   algebra   zoology   Half-n-half Clue