Four of the following five are alike in a certain way so form a group. Which is the one that does not belong to that group? 

Consider a group comprising of 4 students: Reena, Beena, Meena and Neena, who stand in a row.Reena and Beena stand in 6th and 7th positions respectively from the left. Meena and Neena stand in the4th and 5th positions respectively from the right. When Beena and Meena exchange their positions, thenBeena will be 15th from the left. Originally, Neena's position from the left is: 

If A + B means A is the brother of B; A - B means A is the sister of B and A x B means A is the father of B. Which of the following means that C is the son of M?

Complete the following series.

If Monday is the first day of May, how many Wednesdays will be in this month? 

Direction : In each question are given four statements followed by four conclusions numbered I, II, III and IV. You have to assume every thing in the statements to be true even if they seem to be a variance with commonly known facts and then decide which of the four given conclusions logically follows from the statements, disregarding commonly known facts, and select the appropriate answer.

Statements :
All books are files.
Some files are papers.
All papers are certificates.
No certificate is magazine.
Conclusions :
I. At least some books are papers.
II. No magazine is book.
III. At least some certificates are files.
IV. No paper is book.

In a row of girls, Kamya is 5th from the left and Preeti is sixth from right. When they exchange their position, then Kamya becomes 13th from the left. What is the new position of Preeti from right?