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How to participate in International Olympiad exams?

'How to participate in the international Olympiad?' or 'Who conducts the international Olympiad?’, are the common questions among the students and parents. This article provides detailed information about international Olympiads and how to participate in international Olympiads.

In International Olympiads, India and other countries send their selected participants. The institute responsible in India for this selection process is the Homi Bhabha Centre for Science Education (HBCSE).

Subjects in which International Olympiads are conducted are Physics, Chemistry, Biology, Astronomy and Mathematics. Selection of Olympiad participants for international Olympiads is a long process. Following are the five stages for participation in the International Olympiad exams.

Stage 1: Students have to participate in the following National Standard Examination,

National Standard Examination in Physics (NSEP)

National Standard Examination in Chemistry (NSEC)

National Standard Examination in Biology (NSEB)

National Standard Examination in Astronomy (NSEA)

National Standard Examination in Junior Science (NSEJS)

The above exams are conducted by the Indian Association of Physics Teachers (IAPT) in coordination with the Association of Chemistry Teachers (ACT), and the Association of Teachers in Biological Sciences (ATBS)

For details on stage 1 exams please visit

Stage 2: Each state topper in the National Standard Examination (stage 1) gets the opportunity to participate in the respective following Indian National Olympiads (INOs)  conducted by Homi Bhabha Centre for Science Education (HBCSE).

Indian National Physics Olympiad (INPhO)

Indian National Chemistry Olympiad (INChO)

Indian National Biology Olympiad (INBO)

Indian National Astronomy Olympiad (INAO)

Indian National Junior Science Olympiad (INJSO)

About 35 toppers from each of the above exams are selected by the Homi Bhabha Centre for Science Education (HBCSE). For a detailed process of Olympiads selection please visit their website at


Stage 3: Toppers from the above exams (stage 2) are selected by HBCSE for the  Two-week Orientation Cum Selection Camp (OCSC) in respective subjects for about two weeks at Homi Bhabha Centre for Science Education (HBCSE) in Mumbai.


Stage 4: HBCSE selects the Indian teams to participate in International Olympiads based on students' performance in respective OCSC.


Stage 5: Selected Candidate Appears for International Olympiads in Respective Subjects.


Note: For the international Maths Olympiad, the first stage exam is conducted by the National Board for Higher Mathematics (NBHM) and subsequent stages are conducted by HBCSE. For details please visit 


Students participating in International Olympiad exam
Participate in International Olympiad

International Olympiad Syllabus: Please remember that these International Olympiads are not conducted separately for each standard.

(i) For National Standard Examinations in Physics, Chemistry and Biology, students should prepare the syllabus upto standard XII of CBSE in their respective subject. For National Standard Examinations in Astronomy, students need to prepare for Physics and Mathematics up to CBSE class XII along with basic Astronomy.

(ii)For National Standard Examinations in Junior Science, Students should prepare a syllabus for Physics, Chemistry and Biology up to standard X, CBSE.


Therefore students should be either prepared for the standard X syllabus or the standard XII syllabus to appear in these international olympiads. World Olympiads Association conducts International Olympiads for standards I to VIII, which certainly helps students succeed in their future international Olympiads (from standard IX to XII) conducted by HBCSE.

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