In following number series, two terms have been put within brackets. Choose the appropriate option - In the series 7, 14, 28, ..., what will be the 10th term ?

C. 3584

In following number series, two terms have been put within brackets. Choose the appropriate option - Choose the appropriate option 4, 7, (9), 10, 13, 15, (16), 19

A. IF BOTH THE BRACKETED TERMS ARE RIGHT:

In following questions, one term in number series is incorrect. - Find out the incorrect number 121, 143, 165, 186, 209

C. 186