Verbal Reasoning - Mental Ability Questions

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

In the following question, select the related word from the given alternatives.
Sheep : Lamb : : Cow : ?

Select the related word/letters/number from the given alternatives.
PEON : QRHS : : JOCK : ?

In the question, a word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as in two matrices given below. The columns and rows of Matrix I are numbered from 0 to 4 and that of Matrix II are numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its column, e.g., G can be represented by 04, 40, etc., and 'K' can be represented by 56, 75, etc. 

Similarly you have to identify the set for the word 'NILE'.

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

? , 9, 19, 39, 79

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 _

If "S" denotes "multiplied by", "V" denotes "subtracted from", "M"denotes "added to" and "L" denotes "divided by", then

343 L 7 S 6 V 94 M 11 =?

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

8, 27, 125, 343, ?