Revision should not start with "do more papers".
Many students revise by opening a past paper, getting stuck on the same questions, checking the mark scheme, and moving on. That feels like revision. But when the same weak step is not fixed, the next paper will produce the same result. For the patterns parents most often misread as carelessness, see common careless mistakes in IGCSE Maths.
MathPert revision rule
Do not revise everything equally. Fix the repeated weak step first. Then practise changed questions. Then test the method under exam pressure.
Understanding first. Score next.
