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    E:\Working\Focus_Learning\Math_Genius_3_(11-09-2024)\Open_Files\CHAP_01
                 \ 11-Sep-2024  Surender Prajapati   Proof-4                                  Reader’s Sign _______________________ Date __________

                           Practice time 1D

                  1.    Form the greatest and the smallest 4-digit numbers using the given digits.

                                    digits             greatest 4-digit number             Smallest 4-digit number

                        (a)       3, 7, 1, 9

                        (b)       9, 8, 4, 2
                        (c)       5, 7, 1, 0
                        (d)       4, 7, 9, 7

                        (e)       0, 3, 6, 2

                  2.  Form the number with:
                       (a)  4 in the thousands place                     (b)  9 in the thousands place

                            8 in the hundreds place                           1 in the hundreds place
                            5 in the tens place                               0 in the tens place
                            2 in the ones place                               6 in the ones place

                  suCCessor aND PreDeCessor

                  successor

                  The number that comes just after the given number is called its successor.
                  To find the successor of any number, add 1 to the number.

                  example 1: Find the successor of:

                       (a)  86                          (b)  709                         (c)  2,154
                  Solution:  (a) The successor of 86 is 86 + 1 = 87

                                 (b) The successor of 709  is 709 + 1 = 710

                                 (c) The successor of 2,154 is 2,154 + 1 = 2,155
                  Predecessor

                  The number that comes just before the given number is called its predecessor.
                  To find the predecessor of any number, subtract 1 from the number.

                  example 2: Find the predecessor of:

                       (a)  30                          (b)  921                         (c)  8,120
                  Solution:  (a) The predecessor of 30 is 30 – 1 = 29

                                 (b) The predecessor of 921 is 921 – 1 = 920

                                 (c) The predecessor of 8,120 is 8,120 – 1 = 8,119

                  20                                                                                    Mathematics-3

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