hi,

see cutoff score changes year to year and it depends on various factors like number of participants, questions difficulty level, students category, seat reservation etc. nits has 50 percentage seats are reserve for domicile candidates, now coming to jee main april session, its is expected that the number of participants will increase compare to jee main january session, since the nits you have mentioned is one of the top nits, you need to get 250+ score in jee main exam to get btech admission in these nits.