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There are five Rashtriya Military Schools (RMS) located at Chail in the Shimla Hills of Himachal Pradesh, Ajmer and Dholpur in Rajasthan, Belgaum and Bangalore in Karnataka.Rashtriya Military School, Chail is considered to be the best amongst all.
Common Entrance Test for admission to Class VI and IX is held for admission , you can find the question papers online as PDFs and books on Amazon, Flipkart etc