How do you solve calendars and clocks?

How do you solve calendars and clocks?

Counting of Odd Days

1. 1 ordinary year = 365 days = (52 weeks + 1 day.)
2. 1 ordinary year has 1 odd day.
3. 1 leap year = 366 days = (52 weeks + 2 days)
4. 1 leap year has 2 odd days.
5. 100 years = 76 ordinary years + 24 leap years = (76 × 1 + 24 × 2) odd days = 124 odd days.
6. Number of odd days in 100 years = 5.

What is the calendar trick?

Calendar Aptitude Tricks 200 years give us 5 x 2 = 10 – 7 (one week) 3 odd days. 300 years give us 5 x 3 = 15 – 14 (two weeks) 1 odd day. 400 years give us {5 x 4 + 1 (leap century)} – 21} (three weeks) 0 odd days. Month of January gives us 31 – 28 = 3 odd days.

Why are calendars and clocks important?

We can mark time from the stopwatch precision of the Olympic games to our daily schedules of work. We can even date geological events that happened millions or billions of years ago. To do this, modern humans have had to devise increasingly sophisticated clocks, calendars, and timetables.

How do you solve a clock question?

Basic Concept of Clocks: A clock is a complete circle having 360 degrees. It is divided into 12 equal parts i.e. each part is 360/12 = 30°. As the minute hand takes a complete round in one hour, it covers 360° in 60 minutes. In 1 minute it covers 360/60 = 6°/ minute.

Why do we use a calendar?

Calendars are useful tools for keeping track of upcoming meetings, deadlines, and milestones. They can help you visualize your schedule and remind you of important events, such as holidays and vacation time.

Why do we use clocks?

A clock is a device used to measure, verify, keep, and indicate time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units: the day, the lunar month, and the year. Devices operating on several physical processes have been used over the millennia.

Was there ever a year 1?

A year zero does not exist in the Anno Domini (AD) calendar year system commonly used to number years in the Gregorian calendar (nor in its predecessor, the Julian calendar); in this system, the year 1 BC is followed directly by year AD 1.

Why is 1900 not a leap year?

For this reason, not every four years is a leap year. The rule is that if the year is divisible by 100 and not divisible by 400, leap year is skipped. The year 2000 was a leap year, for example, but the years 1700, 1800, and 1900 were not. The next time a leap year will be skipped is the year 2100.

How often do the hands of the clock coincide in a day?

In every hour, both the hand coincide once. In a day, the hands are coinciding 22 times. In every 12 hours, the hands of clock coincide 11 times. In every 12 hours, the hands of clock are in opposite direction 11 times. In every 12 hours, the hands of clock are at right angles 22 times.

How are the hours numbered on the clock?

The clock has 12 hours numbered from 1 to 12. Also, the clock is divided into 60 equal minute divisions. Therefore, each hour number is separated by five minute divisions. If a watch or a clock indicates 8.15, when the correct time is 8, it is said to be 15 minutes too fast.

What does it mean when clock says 8.15?

If a watch or a clock indicates 8.15, when the correct time is 8, it is said to be 15 minutes too fast. On the other hand, if it indicates 7.45, when the correct time is 8, it is said to be 15 minutes too slow. The face or dial of watch is a circle whose circumference is divided into 60 equal parts, called minute spaces.

When does a clock say 10 minute to fast?

If a clock indicates 6 : 10, when the correct time is 6 : 00, it is said to be 10 minute to fast and if it indicates 5 : 50 when the correct time is 6 : 00, it is said to be 10 minute slow. If both hands coincide at an interval x minutes and then total time gained and clock is said to be ‘fast’.