Spirit Blade Mountain - Ch. 314

[MangaDex]

 

[borealisa123]

good luck proving goldbach's conjecture ?

 

[Rogar]

@borealisa123 I laughed so much when I saw that. When I was in college there was a guy who kept giving problems like this to everyone, sometimes they were quite easy, sometimes they were unprooved results like this one, quite fun. ^^