EXO's Baekhyun And BTS's V Are Identical In Selfie, 'Baekhyun And Taehyung' Trends Worldwide http://www.kpopstarz.com/articles/146625/20141205/exo-baekhyun-bts-v-are-identical-in-selfie-baekhyun-and-taehyung-trends-worldwide.htm
Maybe his just showing you everytime he solves a side. There are many outcomes to this picture. And also showing us he had some down time to solve that much! But hasnt had the time for the other sides!