Three packs of batteries are sold in a shop.
Pack A 10 batteries for £5£5£5
Pack B 12 batteries for £5.40£5.40£5.40
Pack C 20 batteries for £9.50 £9.50\,£9.50
Which pack offers the best value for money?
24 exam-style questions on Edexcel GCSE Maths Best Buy Questions. Each one has a worked solution and a mark scheme showing where the marks go.