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    Interdisciplinary Learning                                                      Activity

                      Complete the number pyramid by filling the missing spots.

                                                        5         6         9        17

                  NUMBER GRID

                  In a number grid each grid is replaced by the value of its result. Let us start filling the

                  numbers in the grid by solving each grid.
                      We usually start with the number at the centre. Here, it is 30.

                                             10 less
                                             than 30

                                                         1 more
                                  1 less                   than
                                 than 30      10+20         30                             30

                                            10 more
                                             than 30

                      Now, fill the remaining places in the grid according to the instruction given in each box.

                  SECRET MESSAGE: DECODING

                  Decoding  is  the  process of  converting  a hidden  message to  a meaningful  text. The
                  hidden message or secret message can be in the form of a symbol, number, picture,

                  letter, or a pattern.

                  For example,  if                  1              2            3   then  the  secret message

                                         will be decoded as 132112.

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