Page 132 - Math Skill - 4

130 Maths

Leap Year

The earth takes about 365 days and 6 hours to go around the sun. To make our calculations
easier we take a year of 365 days. The time of 6 hours is generally added every fourth year as
(6 × 4 = 24 hours = 1 day) an extra day in February. Thus, the year has 366 days and is called a

‘leap year’. February otherwise has 28 days in ordinary years.

To check a leap year

If a year is divisible by 4, then it is said to be a leap year.

Some More Conversions

We know that

1 year = 12 months, 1 leap year = 366 days, 1 year = 365 days

1 year = 52 weeks, 1 week = 7 days

Exercise 9.8

1. Convert the following into months.
(a) 10 years (b) 13 years (c) 5 years 8 months
2. Convert the following into days.
(a) 4 weeks (b) 12 weeks (c) 5 weeks 12 days

3. Convert the following.
(a) 73 months into years (b) 240 months into years
(c) 650 days into weeks (d) 360 days into weeks

4. Find whether the given years are leap years or not.
(a) 2012 (b) 2010 (c) 2020 (d) 2400
5. Sohan’s appointment with the doctor was on June 8th. The doctor wants to see Sohan in
six months. In which month should Sohan make an appointment?

6. Many airlines make you purchase a ticket 14 days before flight. If Ajay is to leave on February
18th, on what day should he purchase his ticket?
7. How many months, weeks and days are there between May 24, 2019 and November 4,
2019?

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8. Find the number of days from 26 April 2018 to 9 June 2018.