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Olimpiade Sains Nasional (OSN) adalah even tahunan yang diadakan oleh Direktorat Jendral Pendidikan Menengah di bawah naungan Kementerian Pendidikan dan Kebudayaan (Kemendikbud). Ajang yang mencari siswa berbakat secara akademik seluruh Indonesia ini memang selalu ditunggu oleh seluruh pelajar baik di tingkat SD, SMP, maupun SMA. Antusiasme yang tinggi dari peserta menjadikan kompetisi nasional sebelum ke level internasional ini sangatlah kompetitif.
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