Quantitative Aptitude – Calendar
Calendar Aptitude is a very important chapter for any competitive exams. Most of the competitive exams like SSC, PSC, Bank has this topic in their syllabus. So it’s very important to learn this topic carefully.
Few questions from Calendar chapter will come in exams. To solve those questions, you need to learn the basic formulas of Calendar aptitude. Now here we will discuss those formulas. Learn these formulas and practice.
What is Calendar ?
Calendar is a series of pages which shows days, weeks, months and specific year. A calendar is also showing a seasonal information of a year.
Basic Ideas of Calendar
- Ordinary Years: Years which has 365 days and is not a leap year is called an ordinary year.
- Leap Year: A leap year has 366 days. In a leap year the month of February has 29 days. Except centuries, years which is divisible by 4 is called a leap year. And centuries which is divisible by 400 is a leap year.
- Odd Days: 7 days makes a week. So in a time period of few days the left over days more than the complete weeks are called odd days. Suppose, we need to find the number of odd days in 40 days. So after dividing 40 by 7, we get 5 complete weeks and 5 left over days. These 5 days are called odd days.
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Counting of Odd Days:
1. One Ordinary Year = 365 Days. This means, it has 52 complete weeks and 1 odd day. So, One ordinary year has 1 odd day.
2. One Leap Year = 366 Days. This means, it has 52 complete weeks and 2 odd days. So, a leap year has 2 odd days.
3. In 100 years the odd days will be,
100 years = 76 ordinary years + 24 leap years.
∴ (76 x 1 + 24 x 2) = 124 odd days.
∴ 17 complete weeks and 5 odd days.
So, Number of odd days in 100 years is 5.
4. In 200 years the odd days will be,
(5 x 2) = 10 odd days.
∴ 1 complete week and 3 odd days.
So, Number of odd days in 200 years is 3.
5. In 300 years the odd days will be,
(5 x 3) = 15 odd days = 1 Complete week and 1 odd day.
6. In 400 years the odd days will be,
(5 x 4 + 1) = 21 odd days = 3 Complete week and 0 odd day.
So, this is basically the idea of aptitude calendar chapter. Now if you have any query regarding this topic then please feel free to ask us here. Write your query in the comment section down below. Our team of www.AptitudeTricks.com will answer your question and try to clear your doubts.