Two packs of toilet rolls are available in the supermarket
12 toilet rolls for £4.20£4.20£4.20
6 toilet rolls for £2.16 £2.16\,£2.16
Work out which pack offers the best value for money.
You must show your working.
84 exam-style questions on OCR GCSE Maths Best Buy Questions. Each one has a worked solution and a mark scheme showing where the marks go.