INTERNATIONAL MATHEMATICAL OIL OPENING

President Joko Widodo (right) hit bedug at the opening of International Mathematics Science Olympiad (IMSO) 2016 in Tangerang, Banten, Wednesday (9/11) night. This 13th IMSO followed 23 countries that will last on November 9, 2016. ANTARA PHOTO/Lucky R./aww/16.

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