Most of the students are having difficulties in solving the Calendar problems. The number of days more than the complete number of weeks in a given period, are called odd days. For example : (1) In an ordinary year (of 365 days) there are 52 weeks and one odd day. (2) In a leap year (of 366 days) there are 52 weeks and two odd days. What is the Leap and Ordinary year ? Every year which is exactly divisible by 4 such as 1988, 1992, 1996 et. is called a leap year. Also every 4th century is a leap year. The other centuries, although divisible by 4, are not leap years. Thus, for a century to be a leap year, it should be exactly divisible by 400. For example : (1) 400, 800, 1200, etc are leap years since they are exactly divisible by 400. (2) 700, 600, 500 etc are not leap years since they are not exactly divisible by 400. How to find number of odd days :An ordinary year has 365 days. If we divide 365 by 7, we get, 52 as quotient and 1 as remainder. Thus, we may say tha
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