In "Number Series" question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces

In following number series, two terms have been put within brackets. Choose the appropriate option

2 , 5 , 9 , 19 , 37 , x

A. 76
B. 75
C. 74
D. 72
Answer: B . 75


The second number is one more than twice the first ;
third number is one twice second ; 
fourth number is one more then twice  the third ;
fifth number is one less then twice  the fourth.
Thus the sixth number is one more than twice the fifth.