Top 10 GCSE Maths Exam Mistakes

Many students lose marks in GCSE Maths due to avoidable mistakes.

Here are the most common errors.

1. Not Showing Working

Even if the answer is correct, examiners often expect to see working.

Without working, valuable method marks may be lost.

2. Misreading the Question

Students sometimes miss key information such as:

• units

• instructions

• specific values

Always read the question carefully before starting.

3. Arithmetic Errors

Simple calculation mistakes can cost several marks.

Always check calculations at the end of the exam.

4. Incorrect Rounding

Students sometimes round answers too early in calculations.

Keep full accuracy until the final step.

5. Forgetting Units

Questions involving speed, area, or volume often require units.

Always include correct units in the final answer.

6. Skipping Difficult Questions

Students sometimes panic when they see a difficult question.

Instead:

• move on

• return later with fresh thinking

7. Calculator Errors

Common calculator mistakes include:

• incorrect brackets

• forgetting degree mode

• entering expressions incorrectly

8. Leaving Questions Blank

Even if unsure, attempt something.

Correct steps can still earn marks.

9. Not Checking Answers

Students often run out of time to check work.

Leaving 10 minutes at the end can prevent avoidable mistakes.

10. Poor Time Management

Spend roughly 1 minute per mark and avoid spending too long on a single question.