Key Calendar Concepts for Exams ๐
Key Calendar Concepts for Exams ๐
To excel in calendar reasoning questions for exams like SSC CHSL, focus on these essential concepts:-
Key Calendar Concepts for Exams ๐
To excel in calendar reasoning questions for exams like SSC CHSL, focus on these essential concepts:
1. Days of the Week ๐๏ธ
- There are 7 days: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday.
- Days repeat every 7 days, forming a cycle1.
2. Months of the Year ๐
- 12 months: January to December.
- Each month has a fixed number of days (28, 29, 30, or 31)1.
3. Ordinary Year vs. Leap Year ๐
- Ordinary Year: 365 days (52 weeks + 1 day). That 1 extra day is called an odd day.
- Leap Year: 366 days (52 weeks + 2 days). That 2 extra days are called odd days.
- Leap year rule: Divisible by 4, but century years must also be divisible by 400 (e.g., 2000 is leap, 1900 is not)23.
4. Odd Days Concept ๐ค
- Odd days are the extra days left after counting complete weeks in a period.
- Used to calculate the day of the week for any given date23.
- Example: 365 days รท 7 = 52 weeks + 1 odd day.
5. Day Coding for Fast Calculation ๐ข
Day | Code |
---|---|
Sunday | 0 |
Monday | 1 |
Tuesday | 2 |
Wednesday | 3 |
Thursday | 4 |
Friday | 5 |
Saturday | 6 |
- Use these codes to quickly find the day after a certain number of days2.
6. Century Odd Days & Repetition ๐
- 100 years: 5 odd days
- 200 years: 3 odd days
- 300 years: 1 odd day
- 400 years: 0 odd days (calendar repeats every 400 years)23.
7. Types of Calendar Questions โ
- Finding the Day on a Given Date: With or without a reference date32.
- Matching Calendars: Which year/month will have the same calendar as another2.
- Counting Odd Days: To determine the weekday for a date3.
- Leap Year Calculations: Identifying leap years and their effect on the calendar2.
8. Tricks & Shortcuts ๐ช
- The same calendar repeats after 6 or 11 years for ordinary years and after 28 years for leap years3.
- The first day of a century is always Monday, Wednesday, Friday, or Saturday3.
- Use odd days to quickly find the weekday for any date.
๐ Quick Practice Question
Q: Today is Monday. What day will it be after 61 days? Solution: 61 รท 7 = 8 weeks + 5 odd days. Monday + 5 = Saturday2 ๐๏ธ
Remember:
- Mastering these concepts with practice will help you solve calendar questions quickly and accurately in exams! ๐4
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http://www.placementpreparation.io/logical-reasoning/calendar/concepts/ โฉ๏ธ โฉ๏ธ
https://byjus.com/govt-exams/calendars-logical-reasoning/ โฉ๏ธ โฉ๏ธ โฉ๏ธ โฉ๏ธ โฉ๏ธ โฉ๏ธ โฉ๏ธ โฉ๏ธ
https://testbook.com/reasoning/calendar-reasoning โฉ๏ธ โฉ๏ธ โฉ๏ธ โฉ๏ธ โฉ๏ธ โฉ๏ธ โฉ๏ธ
education.study_materials โฉ๏ธ