Riddles Brain Teaser Of The Day: Weekday Numbers July 10, 2018April 16, 2018 gags Show answer Monday has 6 letters , 1st day and 6+1 = 7 Tuesday has 7 letters , 2nd day and 7+2 = 9 ………. and it is same for rest of the days. Therefore , Sunday has 6 letters , 7th day and 6+7 = 13 So, Sunday = 6713
