Verbal Reasoning - Mental Ability Questions

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?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
24 x 6 - 8 + 2 = ?

The distance between two cities is 30 Km. A man goes at a speed of 30 Km per hour and returns at 20 Km per hour. What is his average speed?

In the following question, select the related number from the given alternatives. 850 : 863 : : 430 : ?

In the following question, select the related letters from the given alternatives.
AGN : IOV : : BLM : ?

Select the related word/letters/number from the given alternatives.
25: 260 : : 30 : ?

Select the related letters from the given alternatives.
WUV : TRS :: QOP : ?

Teacher is related to Class in the same way Driver is related to