Key Stage 2 Problem Solving is a series of graded activity books helping children to sharpen their mathematical skills. It encourages them to apply their maths skills to a range of 'real-life' situations, such as shopping and keeping score in games. Key Stage 2 Problem Solving Book 3 is particularly suitable for children in Years 5 and 6, and covers: rotation of shapes, lines of symmetry, tessellation, percentages, fractions, decimal numbers, time problems and ratio.