In following number series, two terms have been put within brackets. Choose the appropriate option - 1, ?, 5, 10, 20, 40, 80

D. 4

In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative. - aa _ ab _ _ aaa _ a

A. AAAB

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, 3, 4, 8, 15, 27,

C. 50

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 _ bbb _ _ abbbb _ abbb _

B. ABCCB

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. - 11 * 1 / 9, 12 * 1 / 2, 14 * 2 / 7, 16 * 2 / 3,

D. 20