Part 1 Graphs: conversion graphs; graphs and rules; time; travel graphs. Part 2 Estimating your mental power: powers and roots; mental maths; estimation. Part 3 Statistics - questions and answers: diagrams and charts; pie-charts; designing a questionnaire. Part 4 Algebra: number patterns; reversing rules; substitution. Part 5 Transformations: reflections; movement -translations; rotation; enlargement. Part 6 Don't be negative!: replay; the rules for directed numbers; using negative numbers. Part 7 Angles: replay; parallel lines; polygons; bearings. Part 8 Probability: replay; it always adds up to 1; probability - how to make it look difficult; sample space diagrams. Part 9 Percentages and fractions: simple percentages; calculating percentages; fractions. Part 10 Straight lines: lines of the grid; patterns of lines; finding the equation. Part 11 Ratio: the metric system; introduction to ratio; proportion; maps and scales. Part 12 Area: perimeter and area; more ideas; enlargement and area. Part 13 Statistics - getting it together: averages and range; grouping data; frequency polygons. Part 14 Volume - filling the space: pack it in!; stacking; prisms. Part 15 More or less?: trial and improvement; inequalities; solving simple linear inequalities. Part 16 The crossing point: intersecting lines; solving problems with lines; using algebra. Part 17 Help yourself: multiplying; multiplying by 10; multiplying by 100, 1000,...; multiplying by 20, 30,...; multiplying decimals by 10; multiplying decimals by 100; long multiplication; dividing; dividing by 10; dividing by 100, 1000,...; dividing by 20, 30,...; dividing decimals by 10; dividing decimals by 100; multiplying by 0.1, 0.01,...; dividing by 0.1, 0.01,...; adding fractions; subtracting fractions; simplifying fractions. Part 18 Answers: test yourself; help yourself.