hi,

NTSE exam is conducted in 2 stages. Stage 1 of the NTSE exam is conducted by the state board and stage 2 is conducted by NCERT. The candidates who are in class 10 can also apply for the test , however  the candidate must have completed the class IX examination with a minimum of 60% marks. however you may download the state wise questions papers from below link:

https://school.careers360.com/articles/ntse-question-papers

hope it would help.