All model answers are purely the work MathsGenie and this work has neither been seen nor verified by OCR.
Question 1: Substitution, Changing the Subject of a Formula
Question 2: Multiples, HCF, LCM
Question 3: Estimating the Mean
Question 4: Probability, Proportion, Sampling
Question 5: Standard Form, Multiplying and Dividing Numbers in Standard Form
Question 6: Ratio: Converting between Ratio and Fractions or Linear Functions, Ratio Problems
Question 7: Percentages, Simple Interest
Question 8: Circumference of a Circle, Sectors and Arc Lenths
Question 9: Bearings, Angles, Forming and Solving Equations
Question 10: Real Life Graphs, Rate of Change
Question 11: Probability Trees
Question 12: Sequences, Recurrence Relations, Forming and Solving Simultaneous Equations
Question 13: Scale Drawings, Similar Shapes Area and Volume Scale Factors
Question 14: Forming and Solving Quadratic Equations
Question 15: Curved Surface Area of a Cone, Area of a Circle
Question 16: Vectors
Question 17: The Equation of a Circle, The Equation of a Tangent, Perpendicular Lines, Gradient
Question 18: Inequalities on a Graph, Graphical, Area of a Trapezium, Gradient of a Line, Equation of a Line