Verbal Reasoning - Mental Ability Questions

In each of the following question, a question is followed by information given in three statements. You have to study the question along with the statements and decide the information given in which statement(s) is necessary and sufficient to answer the question.

In a family of seven members, how is P related to Q?

I. M and N are children of O, who is the wife of P.

II. A, the cousin of B, is the niece of M. III. Q is the only brother-in-law of B.

The ratio of the ages of man and his wife is 4:3. After 4 years, the ration will be 9:7. If at the time of marriage, the ratio was 5:3, how many years agowere they married?

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

Hydrogen, Helium, Lithium, ?

Select the missing number from the given responses?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
1, 7, 42, 210, 840, ?

Select the missing number?

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

DFI, JNS, TZG, ?

In a certain code language, 'x' represents '+', '÷' represents 'x', '-' represents '÷' and '+' represents '-'. Find out the answer to the following question.

5 ÷ 20 - 4 + 10 x 8 = ?