series

Fill in the missing numbers:

15,16,19,28,55 .........

Answer:

15                           16                           19                           28                           55                           .....

1                              3                              9                              27                           91

Therefore,  55 + 91  =  146  Answer

series

Fill in the missing numbers:

48, 36, 25, 15, .........

Answer:

48                           36                           25                           15                           .....

     (48 – 36) =12                 11                           10                           9    

Therefore,  15 – 9 = 6  Answer

series

Fill in the missing numbers:           

2, 2, 4, 12, ......, 240 

Answer:              

                2                  2                4                 12               ....                    240        

                2               2 x 1          2 x 2              4 x3          12x 4                  48x5

                Answer:  12 x 4 = 48

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.                       

series

Fill in the missing numbers:

    2,3, 5, 7,11, .....

Answer:

                2              3              5              7              11

                All the numbers are prime.

                So, the next prime number is 13.