Complete the following alphabet series.
SQO, USQ, WUS, ?

How many pair of letters are there in the word “EFFECTIVE” which has as many letters (in both forward and backward direction) in between as they have in English alphabet series?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
FU, LO, RI, ?

Select the correct option that will fill in the blank and complete the series.
KNQ, OPR, SRS,_____

Direction: Study the following arrangement carefully and answer the questions given below.
C 3 # R A T 1 E J $ K @ F U 5 4 V I 6 © D 8 * H N 7 δ 2 W

Which of the following is seventh to the left of the twentieth from the left end of the above arrangement? 

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

Which one set of letter when sequentially placed at the gaps in the given letter series shall complete it?
ab __ deabcdfb __ d __ gbcfg __ cf __ h __

Which of the following terms follows the trend of the given list?
ABABAbab, ABABabaB, ABAbabAB, ABabaBAB, AbabABAB, _______________.