In following number series, two terms have been put within brackets. Choose the appropriate option - 2,6,12,20,30,42,56,x

D. 72

In following alphabet series , one term missing as shown by question mark . Choose missing term from options. - OTE, PUF, QVG, RWH, ?

D. SXI

In following questions, a sequence of groups of alphabets and numbers is provided with one term missing , Choose the missing term from options. - A, CD, GHI, ?, UVWXY

D. MNOP

In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative. - c _ bba _ cab _ ac _ ab _ ac

B. ACBCB

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. - 0.5, 0.55, 0.65, 0.8,

C. 1