Aptitude : Calender

(6) It was Wednesday on May 1, 2002. What was the day of the week on May 1, 2006?

• (a)Tuesday
• (b)Wednesday
• (c)Monday
• (d)Friday

Answer

Correct Answer : (d) Friday
There are 4 years between 2002 and 2006. In this case, 2 of the years are leap years (2004 and 2008). A leap year has 2 odd days, while an ordinary year has 1 odd day. Therefore, there are a total of 5 odd days between 2002 and 2006.
An odd day is a day that does not fall on a Sunday, Monday, Tuesday, Wednesday, Thursday, or Friday. When you add 5 odd days to Wednesday, you get Friday.
Therefore, the day of the week on May 1, 2006 is Friday.

(7) What was the day of the week on 28th February, 1997?

• (a)Sunday
• (b)Friday
• (c)Wednesday
• (d)Thursday

Answer

Correct Answer : (b) Friday
The total number of odd days from 1st January 1900 to 28th February 1997 is 0 (from complete centuries) + 48 (from leap years) + 73 (from common years) + 59 (from days in 1997) = 180.
We divide this by 7 to calculate the number of weeks and find the remainder to determine the “extra” days: 180 ?? 7 = 25 weeks and 5 extra days.
Since the reference day (1st January 1900) was a Monday, if we add 5 days to it, we reach a Friday. Therefore, the 28th of February 1997 was a Friday.

(8) If 8th August, 2011 is Monday, what was the day of the week on 8th August, 2010?

• (a)Wednesday
• (b)Friday
• (c)Sunday
• (d)Monday

Answer

Correct Answer : (c) Sunday
Going back from Aug 8, 2011 to Aug 8, 2010, there are no leap years, so it’s exactly 365 days. This is 52 weeks and 1 day, which is 1 day before Monday, so the day was Sunday.

(9) On 4th July, 2013 it was Thursday. What was the day of the week on 4th July, 2012?

• (a)Tuesday
• (b)Wednesday
• (c)Monday
• (d)Saturday

Answer

Correct Answer : (b) Wednesday
Going back from July 4, 2013 to July 4, 2012, there are no leap years, so it’s exactly 365 days. This is 52 weeks and 1 day, which is 1 day before Thursday, so the day was Wednesday.

(10) On 24th October, 2008 Friday falls. What day of the week was it on 24th October, 2007?

• (a)Sunday
• (b)Wednesday
• (c)Thursday
• (d)Saturday

Answer

Correct Answer : (c) Thursday
Going back from Oct 24, 2008 to Oct 24, 2007, there are no leap years, so it’s exactly 365 days. This is 52 weeks and 1 day, which is 1 day before Friday, so the day was Thursday