Verbal Reasoning - Mental Ability Questions

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
XIIIII, IXIIII, IIXIII, IIIXII,IIIIXI, ?

If WORK = 7935, ROCK = 3587 and WART = 1945, which digit stands for T?

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

75 - 5 + 25 ÷ 125 = ?

Pointing a man, Suraj says, "He is the son of the sister of my father's wife". How is that man related to Suraj?

In the following question, select the related word from the given alternatives.
Kilometre : Metre : : Tonne : ?

In the following question, select the related letters from the given alternatives.
JKLM : IIII : : PQRS : ?

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

200, 100, 50, 25, 12.5, 6.25, ?

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

DE, HI, LM,?