If today is Saturday then what will be the day on 363rd day?

The correct option is Thursday.

To find the day on the 363rd day, we can analyze the repeating cycle of the days of the week. Since there are 7 days in a week, the pattern of days repeats every 7 days.

Let today (the 1st day) be Saturday. To find the day of the week for the 363rd day, we divide 363 by 7 to determine the number of complete 7-day cycles and the remaining days:

$$363÷7=51\text{weeks with a remainder of}6$$

In equation form, this can be written as:
$$363=(51\times 7)+6$$
The remainder of 6 means that the 363rd day will fall on the 6th day of the weekly cycle starting from Saturday.

Let us count the days of the cycle starting with Saturday as the 1st day:
1st day = Saturday
2nd day = Sunday
3rd day = Monday
4th day = Tuesday
5th day = Wednesday
6th day = Thursday

Thus, the 363rd day will be Thursday.