In following number series, two terms have been put within brackets. Choose the appropriate option - Look at this series: 3, 4, 7, 8, 11, 12, . . . What number should come next ?

D. 15

In following number series, two terms have been put within brackets. Choose the appropriate option - Look at this series: 2, 6, 18, 54, . . .What number should come next?

C. 162

In following number series, two terms have been put within brackets. Choose the appropriate option - Look at this series: 7, 10, 8, 11, 9, 12, . . . What number should come next?

B. 10

In following questions, one term in number series is incorrect. - Find out the incorrect number 1, 3, 10, 21, 64, 129, 256, 778

D. 256

In following question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces. - 1, 9, 17, 33, 49, 73,

A. 97