do people make more than 1 or 2 silly mistakes in GCSEs?

No

I make a lot of dumb mistakes so I want to know if I am well prepared and ready if I will still make these mistakes because they seem to be really costly looking at the grade boundaries.

Not sure about the actual gcse, but I made a few mistakes some of which were actually silly mistakes in my previous maths mock, it doesn't mean you're not prepared, though, as you get better and with practice you will make less mistakes, and check your work. I didn't really check my work and when I did I rushed through checking it so I didn't actually spot it, it will only cost you grades if you make a lot or were close to the grade boundaries if next grade, there is quote a lot of difference between minimum marks for each grade boundaries, like 54 marks for a 4 and 81 marks for a 5.

I checked them and the difference between A star and A in a few subjects was 6 or 7 which makes me feel scared lol

Yep and thats why some of them get a D instead of an A.

That's not what I expected

Yep and thats why some of them get a D instead of an A. I wonder why?

What do you mean to say?

Oh so basically when students dont check their answers or make mistake in the exam and dont go back to check it, then they get a lower grade than they should be getting

Oh right but I don't think that would make the difference between a D and A just from silly mistakes alone, with gcses people probably make less from practice and experience

Lol I know. I was exagerrating

Didn't seem like it, well you must exaggerate a lot then.

Yes I do, its interesting to see ppls reactions to it.
Did you by any chance have a problem with that first post are sent?

Did you mean "I" instead of "are". I can take and understand jokes but I sometimes find it hard to tell when people are exaggerating or being sarcastic, yeah I kind of did.