1. Percentage Decrease – Calculating the percentage decrease in the price of petrol from £1.32 to £1.02. 2. Simple Interest and Investment Growth – Calculating the future value of a £4500 investment at 7.5% simple interest for 4 years; determining the time needed for the investment to exceed £13,500. 3. Circle Geometry and Triangle Perimeter – Finding the percentage of a square covered by an inscribed circle; solving for triangle side lengths given a perimeter of 80 cm and verifying if it’s a right triangle. 4. Probability and Venn Diagrams – Completing a Venn diagram for 100 people visiting France and Spain; finding probabilities of visiting exactly one country and visiting France given they visited Spain.