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E:\Working\Orange_Education\Math_Genius_2\Open_Files\Chap_02
               \ 26-Sep-2025  Bharat Arora   Proof-10                                   Reader’s Sign _______________________ Date __________





                                                                                                              t    O
                                4.  Rahul bought 25 red balloons, 14 green balloons and

                                     33 yellow balloons for his sister’s birthday party. How
                                     many balloons in all did he buy?

                                     Answer: ___________________________________                          +



              5.  The students of class 2 were on a trip to                               t    O

                   the beach. Before lunch, the class found 45
                   seashells. After lunch, they found 37 more seashells.

                   How many seashells did the class find?                             +

                   Answer: __________________________________


                                                     6.  There are three trees in a park. If 22
                      Challenge Question                                                                      t    O
                  A  shopkeeper begins  with              birds are sitting on the first tree, 35
                  `345  in  the cash  box. He             birds on the second tree and 40 on
                  sells  items worth  `127 and            the third tree, how many birds are
                  later  receives  `89  more.                                                             +
                  Find  the total cash  in two            sitting on the three trees?
                  different ways.                         Answer: ______________________




                     Mental Maths                                                                            Critical Thinking
                1.  Study the addition patterns and complete the following table:

                            3 + 3 =  6              5 + 2 =  7              7 + 8 =  15              9 + 9 =  18

                     So,  13 + 3 =  16       So,  35 + 2 =  37       So,  27 + 8 =  35        So,  19 + 9 =  28


                          23 + 3 =  26             45 + 2 =  47            47 + 8 =  __              49 + 9 =  __

                          33 + 3 =  36             55 + 2 =  __            67 + 8 =  __            59 + 9 =  __

                          53 + 3 =  56             75 + 2 =  __            87 + 8 =  __            89 + 9 =  __


                2.  Nine  squares are shown  in  this  figure which  are arranged
                    diagonally  with  9 at the centre. Fill  in the remaining  squares
                    with  numbers  from 1 to 8 in  such  a way that  the  sum  of both                    9
                    numbers in the squares on each side is equal to 9. One has been                   2

                    done for you.                                                                 7






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