1. algebra   himiya   geometriya   astronomiya   álgebra   Hint Half-n-half Clue   2. botany   álgebra   geometriya   botanika   trigonometriya   Half-n-half Clue   3. trigonometry   álgebra   astronomiya   fizika   trigonometriya   Half-n-half Clue   4. calculus   fizika   psixológija   ischisleniye   zoológija   Half-n-half Clue   5. chemistry   zoológija   himiya   botanika   geometriya   Half-n-half Clue   6. astronomy   filosofiya   istórija   himiya   astronomiya   Half-n-half Clue   7. biology   ischisleniye   zoológija   biologiya   botanika   Half-n-half Clue