72=10*7+2 Friday+2=Sunday
after 72 days mean on 73 th day-friday-saturday-sunday and then monday:answer monday
ANS: SUNDAY
1st day is friday 7th day is Thursday
7*10= 70 th day is Thursday
71st day is friday
72nd day is SATURDAY after 72nday ----> SUNDAY
Many people would think Friday the 13th will be an unlucky day. Is it possible that there is no Friday on 13th through the whole year? How many Fridays at 13th can we have in a year at most? Can you calculate it out?