Verbal Reasoning - Mental Ability Questions

In the following question, select the related letters from the given alternatives.
BPTW : CQUX : : CHNS : ?

Three words in bold letters are given in each question, which have something in common among themselves. Out of the four given alternatives, choose the most appropriate description about these three words.

Vesuvius: Etna: Kilimanjaro

If 13*45 = 29 ,
24*58 = 41 ,
74*32 = 53 ,
what should 97*47 be?

In the following question, select the odd number pair from the given alternatives.

If 3 % 2 = 50, 2 % 4 = 60 then what is the value of 5 % 4 = ?

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

XBC,WFG,VJK,?

Select the related word from the given alternatives.
Cotton : White :: Coal : ?

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

7 V 13 M 35 L 7 S 6 = ?