For Further Maths a passion and an advanced mathematical ability for problem solving is required for this subject. This subject improves your mathematical ability greatly as you will be doing 10 hours of maths a week with FM and Maths. I am currently going into Y13 and I am loving the 10 hours of maths - personally I do Maths, FM, Physics and Chemistry. I have found further maths quite straight forward this year - however I have struggled on certain topics like argand diagrams because their notation isn’t set out like typical graphs. However, once they’re cracked they are super straight forward, they do also appear in Y13 as well. Any ways I think that you have picked well if these are your choices and in all honesty you do NOT need further maths - however it is good to take. Just think about if you have 1 the ability and confidence to take the subject, 2 the skill for time management - this is a huge part of taking 4 A-levels because your revision will be far harder when taking 4 A-levels without a plan or time management! Then finally 3 the motivation to work on it in your free time if you don’t understand something - which is a trait that most people who take maths have because you are likely to run into things that you struggle with and need a bit of work on. Overall my take is that as long as you get a good grade in your GCSE maths then you should be good to go! If you are unsure whether to take it try it out for the first couple of weeks/months in your college/sixth form and then consider whether it is better to keep or drop the subject.