Verbal Reasoning - Mental Ability Questions

Ravish is 7 years older than Vikas. Akash is 3 years younger than Ravish. Mohit is 5 years younger than Akash. Who is the youngest among all the four?

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
-7.25, -5.75, -4.25, -2.75, ? , 0.25

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

56 ÷ 8 + 12 - 72 = ?

If "A" denotes "added to", "B" denotes "divided by", "C" denotes "multiplied by" and "D" denotes "subtracted from", then 87 B 3 C 4 A 4 D 50 = ?

In a certain code language, "ENERGETIC" is written as "ETICGENER". How is "CARTRIDGE" written in that code language?

In each of the following questions three statements are given and these statements are followed by two conclusions numbered (1) and (2). You have to take the given three statements to be true even if they seem to be at variance from commonly known facts. Read the conclusions and then decide which of the given conclusions logically follows from the two given statements, disregarding commonly known facts.
Statements:

All books are novels.
No novel is a magazine.
All magazines are newspaper.
Conclusions: 

I.No book is a magazine.
II. Some newspaper are novels.

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

CLG, GPK, KTO, OXS, ?

A question and two statements labelled (I), (II) are given. You have to decide which statements is/are sufficient to answer the question.

Gowtham ranks eighteenth in a class. What is his rank from the last?

I. There are 47 students in the class.
II. Jagan who ranks 10th in the same class, ranks 38th from the last.