Verbal Reasoning - Mental Ability Questions

In the following question, select the related word from the given alternatives.
Calendar : Date : : Index : ?

Find the next term for the series given below: 5G, 6H, 7I, 8J , ?

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

RTM, QRJ, PPG, OND, ?

How many squares are there in the square figure ABCD?

If 12 (20) 16 and 21 (35) 28, then what is value of A in 48 (80) A ?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
l m _ o _ n m _ l _ n _ _ n m l

Which of the following interchanges in signs and numbers will make the given equation correct?
7 x 9 + 5 = 68

Select the related word/letters/number from the given alternatives. E : V : : D : ?