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The National Science Olympiad (NSO) is an academic and scholastic aptitude competition encouraging learning in Mathematics, Biology, Chemistry, Physics and Computer Science.

NSO Sample Papers are available on - http://www.sofworld.org/

Direct Link to Download Papers Version in pdf : Standard : 3rd :: 4th :: 5th ::6th :: 7th :: 8th :: 9th :: 10th :: 11th - Medical :: 11th - Non Medical :: 12th - Medical :: 12th - Non Medical
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