HSC Multiple-Choice Questions: How to Avoid Common Mistakes

For HSC multiple-choice questions, read the entire question, work out what it asks, compare every option and check that you record your choice against the correct number. Many avoidable mistakes happen between knowing the topic and selecting the answer that fits this particular situation.

You do not need a theory about which answer letter appears most often. You need a repeatable way to test the options against the information in front of you.

Start with the question, before the options

Ask yourself what you are looking for: a cause, a conclusion, a value, an exception or the best explanation. Notice words such as “least”, “most” and “except”. A familiar topic can tempt you to answer a question you expected rather than the one printed.

During reading time, do this mentally. Any writing, working or highlighting must wait until permitted. Once writing time begins, a brief calculation or note can help you hold onto the actual task while comparing answers.

If a graph, passage or diagram is supplied, check its labels and scope. A graph showing one time period cannot automatically support a claim about every year.

Work out a likely answer, then test all the choices

Where possible, form a prediction before choosing. This gives you something to compare with the options and helps prevent a familiar phrase from becoming an automatic selection.

For example, take this original practice question: A quantity rises from 20 to 25. What is the percentage increase? Calculate the increase of 5 relative to the original 20. The result is 25%.

If the options include 5%, 20%, 25% and 125%, each number can look connected to the calculation. Five is the numerical increase; 20 comes from dividing the increase by the final value; 125 describes the final amount as a percentage of the original. Only 25% answers the question asked.

This is why a calculation should start with the required quantity and finish with a check of its meaning. Matching a number alone is not enough.

Eliminate an option for a specific reason

NESA’s multiple-choice advice explains that an option may suit a different situation or contain a mixture of correct and incorrect information. Read all the choices before deciding.

In practice, make yourself name the problem with a rejected option. It might use the wrong unit, contradict the supplied data, reverse a relationship or make a stronger claim than the evidence supports.

If two answers remain, identify their precise difference. One may describe what happened while the question asks why. Another may be generally true but fail under the condition stated in the question. Return to that condition instead of rereading the options without a clear purpose.

Keep the answer sheet in step

Use the answer location specified by the paper. If you skip a question and return later, pause to match the question number with the answer-sheet number before recording anything. A correct choice beside the wrong number will not communicate your answer.

Practise this with the relevant official answer sheet when one is available. It is easy to overlook the recording step when revision consists only of saying answers aloud or checking a solution on screen.

If you change an answer, follow the instructions on that particular sheet. Do not rely on a remembered crossing-out or erasing method from another test. Ask the supervisor if you are unsure about the procedure.

Review with evidence, rather than answer-letter patterns

The NSW Department of Education recommends leaving time to check responses. For multiple choice, prioritise skipped questions, uncertain calculations and any place where you lost track of numbering.

A useful reason to change an answer is finding a misread condition or a calculation error. A run of the same letter is not evidence that one of your answers must be wrong.

After a practice set, record the cause of each error as well as the correct answer. Bring that short list to your teacher or tutor. If you would like help working through recurring mistakes, see North Shore Tutors’ private tutoring or get in touch.

Guidance checked on 15 October 2026.