Objective
Interpret feedback on mock Paper 3 and repair a priority misconception.
Calculator: Non-calculator core; calculator optional only for checking where labelled.

Recall
Retrieve the key fact or method needed for paper 3 feedback and repair.
Core practice
A solid enlarges by length factor 2.5. Find surface area and volume factors.
Reasoning
A learner uses the area factor for volume. Explain why this fails with dimensions.
Exam-style
Solve an exam-style problem involving paper 3 feedback and repair. Show working, include a check and interpret your answer.