Dear Vivek, TS EAMCET entrance exam comprises of 160 questions 80 from Mathematics, 40 from Physics and 40 from Cjemistry. Each right abswer gets you 1 mark. 25% is the minimum cut off for qualifying in TS EAMCET. Which means even if you score 40 marks, you will qualify in TS EAMCET. But mere qualifying doesn't get you a seat. There are other factors like category, stream you choose that play an imporyant role in securing a seat for you. If the stream you have chosen has less no. of seats, then 40 marks wont get you a seat because the competition will be high.