Number Series Questions

Choose the correct alternative that will continue the same pattern and replace 'x' in given series 1,2,6,15,31,56,x

In the following question, select the missing number from the given series.

19, 21, 25, 27, 31, ?

Which number will complete the series?

11,13,17,19,23,25,_____

In the following question, select the missing number from the given series.

9, 13, 22, 38, 63, ?

In the following question, select the missing number from the given series.

1728, 864, 432, 216, ?

In the following question, select the missing number from the given series.

6, 13, 20, 27, ?

Which of the following terms follows the trend of the given list?

XYXYXYxY, XYXYXyXY, XYXYxYXY, XYXyXYXY, XYxYXYXY,  _______________.

Which number will fit in '?' place in the following series?

2, ?, 12, 20, 30, 42