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    E:\Working\Focus_Learning\Math_Genius_2_(09-10-2023)\Open_Files\Chap_10
                   \ 16-Feb-2024  Bharat Arora   Proof-6                                    Reader’s Sign _______________________ Date __________

                  Let us understand it through the calendar of the year 2025.
                                                         2025 CALendAr

                           January                   February                    March                      April
                   Su  M   t  W   th  F  Sa   Su  M  t  W   th  F  Sa   Su  M   t  W  th  F   Sa  Su  M   t  W   th  F  Sa
                              1   2   3  4                          1   30  31                1           1  2   3   4  5
                    5  6   7  8   9  10  11   2   3  4   5  6   7   8   2   3   4  5   6  7   8    6  7   8  9   10  11  12
                   12  13  14  15  16  17  18  9  10  11  12  13  14  15  9  10  11  12  13  14  15  13  14  15  16  17  18  19
                   19  20  21  22  23  24  25  16  17  18  19  20  21  22  16  17  18  19  20  21  22  20  21  22  23  24  25  26
                   26  27  28  29  30  31     23  24  25  26  27  28    23  24  25  26  27  28  29  27  28  29  30
                             May                       June                       July                     August
                   Su  M   t  W   th  F  Sa   Su  M  t  W   th  F  Sa   Su  M   t  W  th  F   Sa  Su  M   t  W   th  F  Sa
                                  1   2  3    1   2  3   4  5   6   7           1  2   3  4   5   31                 1  2
                    4  5   6  7   8   9  10   8   9  10  11  12  13  14  6  7   8  9  10  11  12   3  4   5   6  7   8  9
                   11  12  13  14  15  16  17  15  16  17  18  19  20  21  13  14  15  16  17  18  19  10  11  12  13  14  15  16
                   18  19  10  21  22  23  24  22  23  24  25  26  27  28  20  21  22  23  24  25  26  17  18  19  20  21  22  23
                   25  26  27  28  29  30  31  29  30                   27  28  29  30  31        24  25  26  27  28  29  30
                          September                  October                   november                  december

                   Su  M   t  W   th  F  Sa   Su  M  t  W   th  F  Sa   Su  M   t  W  th  F   Sa  Su  M   t  W   th  F  Sa
                       1   2  3   4   5  6               1  2   3   4   30                    1       1   2   3  4   5  6
                    7  8   9  10  11  12  13  5   6  7   8  9   10  11  2   3   4  5   6  7   8    7  8   9  10  11  12  13
                   14  15  16  17  18  19  20  12  13  14  15  16  17  18  9  10  11  12  13  14  15  14  15  16  17  18  19  20
                   21  22  23  24  25  26  27  19  20  21  22  23  24  25  16  17  18  19  20  21  22  21  22  23  24  25  26  27
                   28  29  30                 26  27  28  29  30  31    23  24  25  26  27  28  29  28  29  30  31
                  Observe that:

                  There are 12 months in a year. January is                        Knowledge Desk
                  the first month and december is the last
                  month.                                                       The earth revolves around the sun taking
                                                                               time about 365 days and 6 hours which is
                  There are 7 months which have 31 days                        known as a year. In four years, the extra
                  each and 4 months which have 30 days                         6 hours each make 6 × 4 = 24 hours. That
                  each.                                                        is why, a day is added in the month of
                  February is the shortest month of the year                   February and thus, a leap year has 366
                                                                               days.
                  with 28. Once in 4 years, February has
                  29 days. Such a year is known as a leap year.

                  A year has 365 days.

                           Quick Check                                            Think and Answer
                         1.   Name the  months  which  have                    1. If  the  present  month  is
                             exactly 30 days.                                     July,  last  month  was  ________  and

                         2.   Name the  months  which  have                       the next month will be ________.
                             exactly 31 days.                                  2. Is the year 2024 a leap year? _______

                   teacher’s
                      tip      Demonstrate how to know the number of days in a month of the year using the nucleus
                               and grooves on hands.

                 178                                                                                     Mathematics-2

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