Question

If 1st July 2022 was Sunday, then what was the day on 1st November 2022?

• A. Monday
• B. Tuesday
• C. Thursday
• D. Friday

Hint:

To calculate odd days faster, find the odd days for each month and add them up. July (30 days) \(\rightarrow\) 2 odd days. August (31 days) \(\rightarrow\) 3 odd days. September (30 days) \(\rightarrow\) 2 odd days. October (31 days) \(\rightarrow\) 3 odd days. November (1 day) \(\rightarrow\) 1 odd day. Total odd days = \(2+3+2+3+1 = 11\). \(11 \div 7\) gives a remainder of 4.

Answer 1

The Correct Option is C

Procedure:
Determine the day of the week for a future date by calculating the total days between dates and identifying "odd days." An odd day is the remainder when total days are divided by 7.

Methodology:
1. Calculate remaining days in the initial month.
2. Calculate days in intervening full months.
3. Calculate days in the target month.
4. Sum all days, divide by 7 for odd days, and add to the starting day of the week.

Example:
Starting date: 1st July 2022 (Sunday). Target date: 1st November 2022.
Days per month:


July: 31 days. Remaining: \(31 - 1 = 30\) days.

August: 31 days.

September: 30 days.

October: 31 days.

November: 1 day (to the 1st).

Total days = \(30 + 31 + 30 + 31 + 1 = 123\) days.

Calculate odd days:
\(123 \div 7\) yields a remainder of 4.
Therefore, there are 4 odd days.

The day on 1st November 2022 is 4 days after Sunday.
Sunday + 4 days = Thursday.

Conclusion:
1st November 2022 was a Thursday.