In following number series, two terms have been put within brackets. Choose the appropriate option - 15,31,63,127,255,x

B. 511

In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative. - bc _ b _ c_ b _ ccb

A. CBCB

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. - 4, 23, 60, 121,

A. 212

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. - 4, 5, 9, 18, 34, (…..)

D. 59

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. - Which term of the series 5, 10, 20, 40, … is 1280 ?

B. 9TH