Several platforms provide comprehensive archives of previous years' questions (OSN-K, OSN-P, and National levels) along with answer keys:
: A community-driven site where you can find PDFs of past questions along with discussion threads. This is particularly useful if you are stuck on a specific problem and need a step-by-step walkthrough. soal osn fisika smp pdf top
: Use a timer when solving these PDFs to build speed. soal osn fisika smp pdf top
These sites are frequently cited by Indonesian students and educators for their comprehensive collections of OSN IPA (Science) materials, specifically the physics section: soal osn fisika smp pdf top
You can find authentic past papers and high-quality practice sets at these links: Forum OSN (Comprehensive Archive):