Verbal Reasoning - Mental Ability Questions

After interchanging + & x and 12 &18, which of the following equations will hold true?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it? a_c_e_b_de

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
MHZ, NIW, OKT, PNQ, ?

In the following question, select the number which can be placed at the sign of ? from the given alternatives.

If 'U' is the husband of 'V', 'V' and 'W' are daughters of 'X', 'Y' is the husband of 'X', then 'Y' is the ____ of 'U'.

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

8,21,60,177,?

What will come in place of the question mark (?) in the following number series?14, 18, 9, 25, 0, ?

If "$" means "addition", "@" means "division", "#" means "multiplication" and "%" means "subtraction", then 84 @ 12 # 3 $ 24 % 35 = ?