Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
aba _ baca _ ba _ bacaabac _ aca

If PKROK code with 72962 and KRRPK coded with 29972 then how will be coded NJMLZ?

Given set
10.5, 15.0, 21.5 

If HOSPITAL is written as 32574618 in a certain code, how would POSTAL be written in that code? 

Out of four figures which figure will best represent the relationship among st the classes:
(1) Sparrow
(2) Birds
(3) Mice

Mohini is taller than Nita but not shorter than Sarita. Sarita and Malini are of the same height. Mohini is shorter that Hema. Among them, who is the second tallest?

In a row of students, Mohan is 10th from right. Sohan is 25th from left. When they change their position then Mohan becomes 22 from right. What is the new position of Sohan from left?

A and B are brothers. E is the daughter of F. F is the wife of B. What is the relation of E to A?