Sarah places £3200 into a savings account that pays 4.5% compound interest per annum. After n n\,n years, the balance in the account is £3816.05.
Work out the value of nnn.
Practise OCR GCSE Maths Compound Interest and Depreciation with exam-style questions for Foundation and Higher tier. 44 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers 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.