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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 __________

                  CloCk                                                Rohan, do you know            To read the time
                                                                         how to read the           correctly, you must
                  Rohan’s mother is buying a beautiful                 time on the clock?         know about the clock.

                  wall clock for her house.

                  A clock tells us the time. It has two

                  hands— a longer hand and a shorter

                  hand. The longer hand is called the

                  minute hand and the shorter hand is

                  called the hour hand. The face of the

                  clock is called its dial. The dial of the                                  I have learnt
                                                                                            reading time in
                  clock is divided into 12 equal divisions,                              complete hours only.
                  marked with numbers 1 to 12 on it.

                  Reading Time when the Minute Hand is at 12

                  In the first clock shown here, the hour hand is at 5
                                                                                              11  12  1         11  12  1
                  and the minute hand is at 12. We say that the time is                     10       2        10       2
                                                                                            9        3        9         3
                  5 o’clock or 5:00.                                                        8        4        8        4
                                                                                              7  6  5           7  6  5
                  We know that the hour hand takes one hour to move

                  from one number to the next. If it has gone from 5 to
                  6, it means one hour has passed.

                  When the minute hand completes one round around the dial, the hour hand moves

                  from 5 to 6. Thus, the time is 6 o’clock or 6:00.

                  Understanding Time for Morning or Evening

                  Rohan usually has his breakfast at around 7                                     We use a.m. – From

                  o’clock in the morning. He does self study at about                11  12  1    midnight to noon
                                                                                    10       2    and p.m. – From
                  7 o’clock in the evening. How will we understand                 9         3    noon to midnight
                                                                                    8       4
                  here that the clock is showing the time in the                      7  6  5

                  morning or evening?

                  To overcome this confusion, we use a.m. (Ante
                  meridiem) and p.m. (Post meridiem).

                  Thus, Rohan’s breakfast time is 7:00 a.m. and his self study time is 7:00 p.m.

                  Mathematics-2                                                                                         171

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