i mean u all ask me regarding ntse !!!
And Class study of class 8 is very similar to the study class 10. Because in every olympiad or competitive exams questions will be from higher level in science and mathematics. And class 8 student can easily study books of class 10 and many coaching institutes teach their students higher class syllabus like Resonance and FIITJEE. so, A class 8 student can easily understand class 10 and class 9 can easily understand class 11. Two classes up are good if you want to become successful.