80% - 100% I really do not understand what you are asking :)
i am very confused that what should i take either maths or bio
maths and science
Yes
i think you nead maths
No take engineering classes
PE Maths and Science
Yes you can. This will involve doing 4 modules for normal maths (usually being Core 1, Core 2, Mechanics 1 and Statistics 1) and then 4 modules for further or pure maths (usually Core 3, Core 4, M2, S2) However, you can do many different ones if you dislike mechanics or statistics. These can include a variety of things such as Decision maths. Many people do both of these and all three sciences which is looked very favorably by the top universities.
To become a pilot you need to have maths and physics or you can take what you most enjoy in school but maths and physics are prefered better.
Maths,astronomy,physics,chemistry,biology
i think it should be maths (angles) art and design
The ideal A levels you should take for product design is Maths, Physics, DT and if forth required Art The ideal ones to do for engineering is Maths, Physics DT and if forth required Further Maths
About 10,000 give or take