On What dates of March 2005 did Friday fall?
Answer: B
To begin with we discover the day on 1.3.2005. 1.3.2005= (2004 year+ period from 1.1.2005 to 1.3.2005 Odd days in 1600 years = 0 Odd days in 400 years = 0 4 years = (1 jump year+ 3 normal years) = (1*2+3*1) odd days = 5 odd days. Jan + Feb + March 31 + 28 + 1 = 60 days = (8 weeks +4 days)=4 odd days. ∴ Total number of odd days = (0+0+5+4) =9=2 odd days. ∴ 1.3.2005 was Tuesday. So, Friday lies on 4.3.2005. Thus, Friday lies on 4th, 11th, 18th and 25th of March, 2005.