Friday, August 2, 2013

series



Fill in the missing numbers:

    15, 16, 19,28,55, .......




Answer:

15                           16                           19                           28                           55

                                15+1                      16+3                      19+ 9                     28+27

                                15 + 30                   16 + 31                   19 +32                    28 + 33

Therefore, answer is 55 + 34  = 55 + 91 =151.                       

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