A circle has a radius of 31 millimetres.
Work out an estimate for the area of the circle.
Is your answer to part (a) an underestimate or an overestimate? Give a reason for your answer.
Practise AQA GCSE Maths Estimating with exam-style questions for Foundation and Higher tier. 64 questions, matched to the AQA GCSE Maths (8300) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.