
1. Area of the Square A = s^{2}sq.units. 2. Area of the Rectangle A = lb sq.units. 3. Perimeter of the Rectangle (P) = 2(l+b). 4. Area of Trapezium A = (h/2)(a+b). 5. Simple Interest I = PTR/100. 6. Area of the Triangle A = (1/2)bh. 7. Volume of the Cylinder V = pr^{2}h. 8. Volume of the Cube V = S^{3}. 9. Volume of the Cuboid V = lbh. 10. Average = (Sum of the quantities) / (Number of quantities). 11. C = (5/9)(F32°) where C is the Celcius degree and F is the Fahrenheit degree. 12. Lateral surface area of Cylinder S = 2prh. 13. Area of sector A = (x/360) * pr^{2}. 14. Area of the four walls A = 2h(l+b). 15. Total surface area of Cylinder A = 2pr(h+r). 16. Total surface area of Cuboid = 2(ab+bh+hl). 17. Profit (P) = Selling price (S)  Cost price (C). 18. Profit percentage = (Profit/Cost price) * 100 19. Loss(L) = Cost price (C)  Selling price (S). 20. Loss percentage = (Loss/Cost price)*100. 21. If 'C' is the cost price, g is the percentage of profit then the selling price S = [(100+g)/100]C. 22. If 'L' is the Loss percentage then the selling price (S) = [(100L)/100]C. 23. Area of the ring A = p(R^{2}r^{2}). 24. Diagonals in a Polygon with n sides = [n(n1)/2]  n. 