Direction: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.
ab_bba _ _bba _abb _ _a 

Direction: Study the following arrangement carefully and answer the given question below. 

S D 9 5 E # K 6 T I 8 P 1 % A 2 C λ L M U3 W @ N 4 © J $ 7 F B 

What should come in place of the question mark (?) in the following series based on the above arrangement?
#K5 P1I CλA ?

Direction: From the given alternatives select the word which cannot be formed using the letters of the given word. 
INDETERMINATE 

deb, ijg, nol, ? , xyv 

From the given alternatives select the word which cannot be formed using the letters of the given word
ADMINSTRATOR

Directions: - In each of the following questions, five words are given. Which of them will come to arrange the following words according to English dictionary order.
1. Yangtze
2 . Yakking
3 . Yakuzas
4 . Yobbery
5 . Yobbish 

How many such pairs of letters are there in the word ‘OBLIGATION’ each of which has as many letters between them in the word as they have between them in the English alphabet?