Question

It was Sunday on 12 February 1882. What was the day on 12 February 1885?

• A. Wednesday
• B. Thursday
• C. Friday
• D. Saturday

Hint:

To quickly check if a year is a leap year, divide the last two digits by 4. If the remainder is 0, it's a leap year (except for century years, which must be divisible by 400).

Answer 1

The Correct Option is B

Concept: The day of the week for a specific date shifts each year based on "odd days."
• A non-leap year (365 days) has \(365 \div 7 = 52\) weeks + 1 odd day.
• A leap year (366 days) has \(366 \div 7 = 52\) weeks + 2 odd days.
Step 1: Count the years and identify leap years.
From 12 Feb 1882 to 12 Feb 1885 is exactly 3 years.
• 1882 to 1883: 1883 is a common year (\(365 \text{ days}\)) = 1 odd day.
• 1883 to 1884: 1884 is a leap year. Since we cross Feb 29, 1884 = 2 odd days.
• 1884 to 1885: 1885 is a common year (\(365 \text{ days}\)) = 1 odd day.

Step 2: Calculate total odd days and the final day.
Total odd days = \(1 + 2 + 1 = 4\) days.
Sunday + 4 days = Thursday.