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    E:\Working\Orange_Education\TouchPad_Maths_4\Open_Files\Chap_05\Chap_05
                 \ 09-Nov-2025  Bharat Arora   Proof-8                                     Reader’s Sign _______________________ Date __________

                example. Find the first two common multiples of 3 and 5.
                Solution. The multiples of 3 and 5 are shown on the number line:

                   0  1  2  3  4  5  6  7  8  9 10 11  12 13 14 15 16 17 18 19 20  21 22 23 24 25 26 27 28 29 30  31 32 33 34 35 36 37 38 39
                Thus, the first two common multiples of 3 and 5 are 15 and 30.

                            Exercise 5B

                    1.  use the number line to find the common multiples of:

                        a.  2 and 3

                              0    1   2   3   4    5   6   7    8   9 10 11     12   13 14 15 16 17 18 19 20
                            The common multiples of 2 and 3 are: _____________________________________
                        b.  5 and 10

                              0    1   2   3   4    5   6   7    8   9 10 11     12   13 14 15 16 17 18 19 20
                            The common multiples of 5 and 10 are: _____________________________________

                        c.  3 and 6

                              0    1   2   3   4    5   6   7    8   9 10 11     12   13 14 15 16 17 18 19 20
                            The common multiples of 3 and 6 are: _____________________________________
                    2.  Find the first four common multiples of:
                         a. 4 and 5         b. 2 and 5            c.  2 and 7          d.  10 and 20      e. 6 and 8

                    3.  Find the common multiples of the following. Circle the smallest common multiple.
                        a.   2 and 9         b.  5 and 6          c.  8 and 12         d.  10 and 15      e.  15 and 20

                FACtORS

                Let us take 18 buttons and arrange them in rectangles in as many ways as we can.

                                                                  1 × 18

                                                   2 × 9

                                                                                       3 × 6

                       84        Mathematics 4

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