Need help with maths

I'm doing Rd sharma for mains and after doing some problems on a particular topic of a chapter I take a look at the pyqs for IAT aur ek bhi abhi tak lag nhi raha hai. I am analysing questions what im missing and reattempt them after some time but whenever I see a new question i'm stump. Physics mai Kalam chalake aajayega kuch na kuch chemistry mai bhi same and bio ka tension nhi maths mai question lag hi nhi parahe kya karu.