The HARDEST elementary MATHS question I was ever asked in an EXAM (national olympiad)

Hello everybody!!! ❤️ I'm Ioana - a Fourth-Year Mathematics student at the University of Oxford and in this video I am sharing with you one of the most difficult questions I got asked in a national olympiad - a seemingly simple number theory question from the Romanian National Olympiad 2015 (for year 7 - students aged 13-14). Hope you enjoy this new style of videos and definitely let me know if you have any questions about the solution!! 😄

If you're interested in university-related content, studying, or Maths-related content - join me on my journey! ✨

My socials:
Instagram: www.instagram.com/ioanaroman27/
TikTok: @portlibrimo
LinkedIn: www.linkedin.com/in/ioana-roman27/

Thank you so much for watching and have a wonderful day! x