If 21 May 2009 is a Thursday, then what will the day of the week on 15 July 2017?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Saturday.
21 May 2009 to 21 May 2017 = 6 ordinary years + 2 Leap years
Odd days in 6 ordinary years + 2 Leap years = (6 × 1) + (2 × 2) = 10 ÷ 7 = 3 odd days
Days from 21 May 2017 to 15 July 2017 = 10 (May) + 30 (June) + 15 (July) = 55 days
Odd days in 55 days = 55 ÷ 7 = 6 odd days
Total odd days = 3 + 6 = 9 ÷ 7 = 2 odd days
21 May 2009 is a Thursday so, 15 July 2017 will be Thursday + 2 = Saturday.