MATH
1. AVERAGE 2. Square root and cube root 3. Surf & indices 4. Bodmass 5. Unit place digit 6. Time & work 7. Pipe & cistern 8. Work and wage 9. Time-speed-&-distance 10. Boat and stream 11. Train 12. Profit loss 13. Ratio and proportion 14. Mixture 15. Partnership 16. Age 17. Alligation