Page 136 - Start Up Mathematics_3

Leap Year

We know that the earth revolves around the sun. It takes 365¼ days to complete one

revolution. These 365¼ days constitute one year. But for convenience, we take one
year to be of 365 days. Every fourth year, we add 1 day to February to compensate for
the ¼ day left out every year. This year in which February has 29 days instead of 28
days is called a leap year. We can find out if a year is a leap year or not by dividing it
by 4. If there is no remainder left, it is a leap year. For example, 2008 was a leap year
as it can be completely divided by 4 (2008 ÷ 4 = 502).

A leap year has 52 weeks and 2 days.

EXERCISE 9.3

1. Tick (3) the correct estimate of time to do the following activities.

(a) Brush teeth 3 minutes/3 hours

(b) Read a story book 2 minutes/2 hours

(c) Play computer games 25 minutes/25 hours

(d) Play a game of cricket 5 minutes/5 hours
(e) Go from Mumbai to Kolkata 2 weeks/2 days

(f) Polish shoes 10 minutes/10 hours

2. Fill in the blanks.

(a) Monday comes before _______________.

(b) Starting from Monday, the 4th day of the week is _______________.

(c) The fifth month of the year is _______________.

(d) If the last month was September, what will be the next month?
_______________.
(e) If tomorrow is Sunday, yesterday was

_______________. A Challenge!
Can you guess the day
(f) Two months which consecutively have on which your birthday
31 days are _______________ and will fall next year?
_______________.

(g) If today is 31 July, what date will it be tomorrow? _______________

(h) Two months after October is _______________.

128