A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
5, 11, 21, 43, 85, ?

Complete the following alphabet series.
ZA : YB :: YC :?

DIRECTIONS: What Comes in place of question mark (s) in the following letter series?
AYBZC, DWEXF, GUHVI, JSKTL,?

Select the letter that can replace the question0a mark (?) in the following series.
K, B, N, D, Q, F, T, H,?

Find the missing (?) in the series AIQ, BJR, CKS, DLT, ?, 

Rearrange the jumbled letters to make a meaningful word and then select the one which is different.

Find the missing term of sequence.
AB, BA, ABC, CBA, ABCD, ____