The next number in the series 6, 13, 21, 30, –––– is.

Find out the missing number from the alternatives in the following number series 118? 27964:

Which of the missing numbers will complete the series?

7, 10, 9, 12, 11, –––, –––.

Insert the missing number

18, 8, -2, -12 ?

Find the missing number in the series 7, 10, 16, 25, 37, 52, ? 

Next number in the series

6, 13, 21, 30, 40, 51, 63, –