Verbal Reasoning - Mental Ability Questions

Select the related word/letters/number from the given alternatives.
66 : 36 : : 99 : ?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

45 x 5 - 24 + 3 ÷ 80 = ?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
a _ bc _ a _ bcdabc _ da _ cd _

Find out the odd word/letters/number/number pair from the given alternatives.

In the following question, select the related number group from the given alternatives.
19 : 367 : : ? : ?

In a certain code language, '-' represents '+', '+' represents 'x', 'x' represents '÷' and '÷' represents '-'. Find out the answer to the following question.

3 ÷ 12 - 40 + 5 x 20 = ?

If - stands for division, + for multiplication, ÷ for subtraction, x for addition, then which of the following equations is correct?

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

FGH, NOP, VWX, ?