this is rs Agarwal class 9 math book it has a lot of questions in this this help you in practising so much questions of math (ye class ninth ki r s Agrawal ki book hai isko Maine thoda use Kiya hua hai kahin per ek ya do highlighter ke point se yah bahut hi acche book hai ismein bahut se variety question ki jisse aapko ninth class mein math ke liye bahut help hogi)