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    2.  Form a number with:

                        a.   6 at thousands place     b.  9 at thousands place     c.  3 at thousands place
                             2 at hundreds place              1 at hundreds place             7 at hundreds place

                             7 at tens place                  0 at tens place                 2 at tens place

                             1 at ones place                  5 at ones place                 4 at ones place

                    3.  Can you correct your friends?

                        Riya and Prakash have made the greatest and the smallest                     9750          9705
                        4-digit numbers using the digits: 9, 0, 7 and 5.
                                                                                                     0579          5079
                        a.   Circle the number which is not appropriate.
                                                                                               riya         Prakash
                        b.   Who has made the correct greatest number? __________

                        c.   Who has made the correct smallest number? __________

                SUCCESSor AND PrEDECESSor

                Successor

                The number that comes just after a given number is called its Successor. We can find
                the successor of a number by adding 1 to the number.

                Example 1. Find the successor of:

                             a.  7                          b.  88                        c.  648
                Solution.  a.  The successor of 7 = 7 + 1 = 8

                             b.  The successor of 88 = 88 + 1 = 89
                             c.  The successor of 648 = 648 + 1 = 649

                Predecessor

                The number that comes just before a given number is called its Predecessor. We can

                find the predecessor of a number by subtracting 1 from the number.

                Example 2. Find the predecessor of:

                             a.  6                          b.  99                        c.  1246
                Solution.  a.  The predecessor of 6 = 6 – 1 = 5

                             b.  The predecessor of 99 = 99 – 1 = 98
                             c.  The predecessor of 1246 = 1246 – 1 = 1245

                       26        Mathematics 3

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