3 line solution?! | Q1 USAMO 1979 | Math Olympiad Training

Welcome! In this video we will be going through Q1 of the USAMO 1979, which has a very neat solution! Leave a comment below if you manage to solve it!
Happy problem solving :)

[Gaspar-sAu]

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[cheikhbaykhlifa]

I think we can also use modulo 2 since its make it alot easier

[dlu]

I think the proof would be a bit more complete if we proved that n^4 is indeed congruent to 0 or 1 mod 16. But thanks for the video 😉