1. Error Intervals – Determine the error interval for the length of a football pitch, given to the nearest meter. 2. Area per Person Comparison – Calculate the difference in the area per person allowed at two festivals based on their total area and maximum capacity. 3. Probability and Venn Diagrams – Complete Venn diagrams based on given data about product usage, and calculate conditional probabilities. 4. Volume and Geometry – Calculate the volume of composite shapes, estimate fish population in a lake using capture-recapture methods, and find unknown dimensions like the height of a cone when joined to a hemisphere.