This is one of the easiest subject in IGCSE if not the easiest. If you’re a pro in Maths B, Maths A should be as easy as pi for you. Just make sure you know the basics REALLY WELL because the questions asked can be VERY tricky. There are a few extra topics in Maths A like the recurring decimal. This is a bit difficult topic so do work on that. Check out the examiners’ reports as well.