Maths School GuideBy Mayank Kurra ( Free )
These are very useful maths formulas that serve as a quick reference.This includes topics:Algebra:List of Squares, Cubes, Fouths & fifthsList of Percentages, Fractions, DecimalsLogarithmsExponentsQuadratic EquationsTrigonometryGeometryArea and Perimeter of Circle, Square, Rectangles, Parallelogram, Ring, Sector, Trapezoid, ...