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HSC Standard Maths Resources

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16. Annuities

Check out the overview section for relevant importance of this section compared to other topics in this course. In 2019 exam, one question appeared from this topic making up 3 marks (2019Q42). This section covers the following parts of the syllabus:

The infographic below shows all the past exam questions from 2010 to 2019 relevant to this topic sorted by difficulty level and further broken down into sub-topics. This will form the foundation of our study as we would like you to focus first on the easy questions and quickly develop skills to get those easy marks and then challenge yourself with the harder ones. Annuity involves periodic payments over time. Questions of interest are: future value of an annuity, present value of annuity and periodic payments needed to be made to achieve a certain value in future.

The following are formulas you need to know to calculate future value (FV) and present value (PV) of a given annuity. A question can ask any part of the formula either FV or a or i or t but as long as you understand the formula well, you should be alright.

Example 1

Alan deposits \$500 at the end of each month for a year into an investment that has a return of 3% p.a. compounded monthly. What is the value of annuity after a year? What is the present value of annuity?

Instead of working out FV and PV using formula, there are times when you may be provided with a table of PV or FV for different interest rates & time periods.

For these kinds of problems, you will need to look up correct value from table and use it to answer the question.

Example 2

Following table shows the future value of \$1 invested at the end of each period at the given interest rate. What is the future value of \$350 invested at the end of each month for 3 years at 3%p.a. compounded monthly? How much needs to be invested every month so that there is \$50,000 at the end of 4 years if interest rate is 6% p.a. compounded monthly? The following is the type of questions you can expect in exam:

Study notes of this section and other resources can be accessed here:

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