Verbal Reasoning - Mental Ability Questions

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

Johnny's father is the brother­in­law of Nisha's only sister. How is Johnny related to Nisha?

Select the odd word from the given alternatives.

If 8*2 = 3, 14*18 = -2 and 18*2 = 8, then find the value of 14*10 = ?

If 70$7 = -10, 50$5 = -10 and 40$8 = -5, then find the value of 10$2 = ?

If 18α1 = 34, 19α2 = 34 and 18α3 = 30, then find the value of 18α8 = ?

If 15#2 = 26, 11#3 = 16 and 10#9 = 2, then find the value of 11#4 = ?

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?
J_J_L_KL_JK_MN