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Page 180 - Math Genius C2
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    E:\Working\Orange_Education\Math_Genius_2\Open_Files\Chap_10
                   \ 26-Sep-2025  Bharat Arora   Proof-10                                   Reader’s Sign _______________________ Date __________

                  Let us understand this with the calendar of the year 2026.

                                                         2026 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    1   2  3   4  5   6   7   1   2   3  4   5  6   7              1   2   3  4
                    4  5   6  7   8   9  10   8   9  10  11  12  13  14  8  9  10  11  12  13  14  5  6   7  8   9  10  11
                   11  12  13  14  15  16  17  15  16  17  18  19  20  21  15  16  17  18  19  20  21  12  13  14  15  16  17  18
                   18  19  20  21  22  23  24  22  23  24  25  26  27  28  22  23  24  25  26  27  28  19  20  21  22  23  24  25
                   25  26  27  28  29  30  31                           29  30  31                26  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
                   31                 1  2        1  2   3  4   5   6              1   2  3   4   30  31                1
                    3  4   5  6   7   8  9    7   8  9  10  11  12  13  5   6   7  8   9  10  11   2  3   4   5  6   7  8
                   10  11  12  13  14  15  16  14  15  16  17  18  19  20  12  13  14  15  16  17  18  9  10  11  12  13  14  15
                   17  18  19  20  21  22  23  21  22  23  24  25  26  27  19  20  21  22  23  24  25  16  17  18  19  20  21  22
                   24  25  26  27  28  29  30  28  29  30               26  27  28  29  30  31    23  24  25  26  27  28  29
                          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                  1   2   3   1   2   3  4   5  6   7           1   2  3   4  5
                    6  7   8  9   10  11  12  4   5  6   7  8   9  10   8   9  10  11  12  13  14  6  7   8   9  10  11  12
                   13  14  15  16  17  18  19  11  12  13  14  15  16  17  15  16  17  18  19  20  21  13  14  15  16  17  18  19
                   20  21  22  23  24  25  26  18  19  20  21  22  23  24  22  23  24  25  26  27  28  20  21  22  23  24  25  26
                   27  28  29  30             25  26  27  28  29  30  31  29  30                  27  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                      Once in 4 years, February has 29 days.
                  month.                                                        Such a year is known as a leap year.
                  There are 7 months which have 31 days                         The earth revolves around the sun

                  each and 4 months which have 30 days                          taking about 365 days and 6 hours
                                                                                which make up a year. In four years,
                  each.                                                         the extra 6 hours each make 6 × 4 =

                  February is the shortest month of the year                    24 hours. That is why a day is added in
                  with 28 days.                                                 the month of February and thus, a leap
                                                                                year has 366 days.
                  A year has 365 days.

                          Fast Check                                              Think Tank                       Critical Thinking

                         1.   Name the  months  which  have                     1. If the present month is July,
                             exactly 30 days. _______________                      last month was ________ and  the
                         2.   Name the  months  which  have                        next month will be ________.
                             exactly 31 days. _______________                   2. Was the year 2024 a leap year? _____

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

                 178                                                                                    Mathematics-2

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