In following alphabet series , one term missing as shown by question mark . Choose missing term from options. - CE, GI, KM, OQ, ?

C. SU

In following alphabet series , one term missing as shown by question mark . Choose missing term from options. - AZ, CX, FU, ?

C. JQ

Look at this series: 1.5, 2.3, 3.1, 3.9, . . .
What number should come next?

C. 4.7

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, 1, 3, 9, 6, 36, 10, 100, , 225

A. 15

In following number series, either one term is missing or is incorrect. - Choose correct answer from options 1, 5, 11, 19, 29, 55

B. 41