Hellow guys, Welcome to my website, and you are watching [핫클립]마술 같은 수학! 당신의 생일은 무슨 요일?! / YTN 사이언스. and this vIdeo is uploaded by YTN 사이언스 at 2014-08-24T21:26:12-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.