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

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?
AB_AB_AA_BB_

5, 7.5, 12.5, 22.5, ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
 DAF, FED, HIB, ? 

In the following question, select the word which cannot be formed using the letters of the given word.
CAPABILITIES

Select the combination of letters that when sequentially placed in the blanks of the given series  will complete the series.
rtx_sx_z_txy_ _ yz

Which of the following words will be at third place in Dictionary ?

Which letter-cluster will replace the question mark (?) to complete the given series?

MU, NE, PX, QF, SA, TG, ?