Verbal Reasoning - Mental Ability Questions

Pointing towards a boy, a girl says, "He is the only son of my mother's brother". How is the girl related to the boy ?

In the following question, select the related letters from the given alternatives.
JPSW : LQUX : : MRFT : ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.AK12, GV29, LF18, PO?

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

XXXXXO, XXXXOX, XXXOXX, XXOXXX, XOXXXX, ?

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
400, -200, 100, ? , 25, -12.5

If 8 θ 12 δ 6 = 60 and 13 θ 15 δ 11 = 74, then 18 θ 21 δ 15 = ?

Bommy is the daughter of Indu's brother. Indu has one sister, Chanda and one brother , Gopal. How is Bommy related to Gopal?

If, 1*2= 1,
2*3= ­1 and
3*4= ­5, Then find the value of 7*9= ?