If Today Is Tuesday, what will be the day after 13 days

How do we solve it ?

A week has 7 days " Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday ".

13 / 7 = 1 ( Remainder = 6)

So you can say that after multiples of 7 days, the day will repeat itself as tuesday.

Hence after 7 days Tuesday will occur again.

So we calculate after the remainder (6) , the answer is Monday.

Simple Logic = And whatever the remainder obtained is, add that to the day.