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    E:\Working\Orange_Education\TouchPad_Maths_4\Open_Files\Chap_11\Chap_11
                     \ 10-Nov-2025  Bharat Arora   Proof-8                                    Reader’s Sign _______________________ Date __________

                    leap Year

                    A year with 366 days is called a leap year.
                                                        1
                    The Earth actually takes 365  days to go
                                                        4
                    around the sun. It means a year actually
                               1
                    has 365  days  but  for  our convenience
                               4
                    we take only 365 days. After every 4 years,
                               1    1    1    1
                    we add   +   +   +   = 1 day to the year,
                              4     4    4    4
                    thus  making it  366 days. In  a leap year,

                    February has 29 days.

                    Note that a year will be a leap year if it is divisible by 4 but not by 100. If a year is

                    divisible by 4 and by 100, it is not a leap year unless it is also divisible by 400.

                    Calculating days

                    While calculating days, we need to remember the number of days in the particular

                    month.

                                                                                                          Tips

                      Do you have any problem remembering the number                Jan  Mar  May  July  Aug  Oct   Dec
                      of days in a month?                                              Feb  Apr  June      Sep   Nov

                      Here is a trick.
                      •  Fold your hands as shown.

                      •  All the knuckles show the months with 31 days.
                      •  The others (except February) have 30 days.

                    example 1. How many days are there between 20th January and 28th February?

                    Solution. January has 31 days and February has 28 days.
                                                                                                               Here, we
                    So, 20th January to 31st January = 31 – 20 = 11 days                                      include the

                    and 1st February to 28th February = 28 days                                                last day.

                    So, the total number of days between 20th January and 28th February

                                                               = 11 + 28 = 39 days.

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