Tips And Tricks And Shortcuts For Clocks And Calendars

Type 2: Tips ad Tricks for Clocks

Question 2.

Calculate the time between 6 and 7   o’clock when the hands of a clock are in the same straight line but are not together?

Options:              

A.  65.45 min past 6
B.  60 minutes past 6
C.  50 minutes past 6
D.  Cannot be determined

Correct Option: A

Solution:

Tip: You can use a short formula to calculate the time when the angle is given 

Angle =  (minutes) -30 (hours)

Using the above formula, we get

180 =  (minutes) -30 (hours)

180 =   (minutes) – 30 (6)

180 + 180 =  minutes

Minutes = 2 x 360/ 11

= 65.45

Type 1: Calendars Tips and Tricks

Question 1.

Find the day for a given date ,What was the day on 26^th May 2006?

Options:

A.  Monday
B.  Friday
C.  Wednesday
D.  Saturday

Correct Option: B

Solution:

26 May 2006 = (2005 years + time period from 1/1/2006 to 26/5/2006)

To calculate number of odd days till the year 2000, we require

Number of odd days in 1600 years = 0

Number of odd days in 400 years = 0

In the next step, for calculating odd days in the next five years,

5 years = (4 ordinary years + 1 leap year)

= 4 +2

= 6 odd days

Now, we have to calculate the number of odd days from 1^st January 2006 to 26^th May 2006.

January (31 days) + February (28 days because 2006 is not a leap year) + March (31 days) + April (30 days) + May 26 days = 146 days

Total number of odd days in 146 days = (146/7) = 20 weeks + 1 odd day

Total number of odd days in the entire period = 0 (1600 years) + 0 (400 years) + 5 (5 years) + 0 (time from 1/1/2006 to 2/2/2006) = 5 odd days

According to the table, on 26^th May 2006, the day was Friday.

Type 2: Calendar Tips and Shortcuts

Question 2.

Find out a day when some other day is given ,It was Friday on 7^th December 2007. What was the day on 7^th December 2006?

Options:

A.  Tuesday
B.  Monday
C.  Friday
D.  Thursday

 Correct option: D

Solution:

2006 was not a leap year

Hence, the number of odd days is 1

Now 7^th December 2007 will be 1 day beyond the day on 7^th December 2006 due to one odd day.

Since, 7^th December 2007 was a Friday, hence, 7^th December 2006 was a Thursday.

Type 3: Tips and Tricks for Calendar

Question 3.

Which year after 2005 will have the same calendar as of 2005?

Options:

A.  2011
B.  2022
C.  2015
D.  2054

Solution:

The given year is 2005 which is not a leap year

We add 11 years to the given year and get (2005 + 11) = 2016 which is a leap year

Also add 6 years to the given year (2005 + 6) = 2011

Hence, the calendar for 2005 will be same as for the year 2011.