S.NO Name of the Competitive Examination Exam Date Eligibility Organisers Website
1 National Talent Search Examination (NTSE) Stage I : November
Stage II : May
Class X Appearing NCERT –NEW DELHI www.ncert.nic.in
2 National level Science Talent Search Examination (NSTSE) Jan Class - II to XII UNIFIED COUNCILOF INDIA, HYDERABAD www.unifiedcouncil.com
3 National Science Olympiad (NSO) Nov
Class - II to XII
Science Olympiad Foundation-NEW DELHI
www.sofworld.org
4 National Cyber Olympiad (NCO) Sep Class - II to XII Science Olympiad Foundation-NEW DELHI www.sofworld.org
5 International Mathematics Olympiad(IMO) Dec Class - II to XII Science Olympiad Foundation-NEW DELHI
www.sofworld.org
6 SIMO,SISO,SIPHO, SICHO,SIBO,INAT (SIMO Indian Mathematics Olympiad) Stage I : Sep
Stage II : Dec
Class - III to XII Simo Education Ltd-HYDERABAD www.simoeducation.com
7. International Olympiad of Science (IOS) Dec Class - I to X Society of Science Education (SSE), New Delhi www.silverzone.org
8. International Olympiad in Mathematics (IOM) Nov/Dec Class - I to XII Mathematic Olympiad Foundation (MOF), New Delhi
www.silverzone.org
9. Smart Kid General Knowledge Olympiad (SKGKO) Dec Class - I to X Society of Science Education (SSE), New Delhi www.silverzone.org
10. State Level Science Talent Search Examination (SLSTSE) - AP Feb Class - IV to X
Unified Council,Hyd
www.unifiedcouncil.com
11. National Standard Examination in Jr.Science (NSEJS)- Followed by International Junior Science Olympiad (IJSO) Nov Students of Class X or lower born or after (Jan 01, 1998) Indian Association of Physics Teachers, Pune (IAPT)- Further Stages are conducted by HBCSE, Mumbai www.iapt.org.in 
www.hbcse.tifr.res.in
12. AMTI prelims & Final –Regional Mathematics Olympiad Aug &Nov Class - V to XII Association of Mathematics Teachers of India
www.amtionline.com
13. Dr. A.S. Rao Talent School Exam Dec Class - VII to X Bala Vikasa Kendra www.drasrac.org
14. Olympiad Conducted By CBSE Nov to Jan Class - VIII to XII CBSE (New Delhi) www.cbseacademic.in
15. Olympiad Conducted By KVS Nov to Jan Class - VIII to X KVS (New Delhi) www.kvsangathan.nic.in
16. Scheme for Early Attraction of Talent (SEAT) Nov Class - VI to X Department of Science and Technology, Government of India
www.inspire-dst.gov.in/
17. Unified Cyber Olympiad (UCO) Sep Class - III to XI Unified Council, Hyderabad
www.unifiedcouncil.com
18. The Velammal Science Talent Search Exam Oct Class - I to XII The Velammal Educational Trust of Tamil Nadu
www.velammalsciencetalenttest.com
19. All Indian Open Mathematics Scholarship Examination June Class - III to IX Institute for Promotion of Mathematics
www.ipmindia.in
20. Bhaskar Genius Scholarship April/May Class - IV to XII Dainik Bhaskar Group
www.bhaskargenius.org