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.

IB,QD,XH,DP,?

Gopal is older than Mohan but younger than Ram. Mohan is older than Sohan but younger than Ram. Who is the oldest?

Arrange the given words in the sequence in which they occur in the dictionary.
i. nature
ii. nest
iii. numeric
iv. news

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

hello, lower, error, organ, tense, ?

If 23@5=56; 6@7=26; 5@2=14; then what is the value of 7@5=?

If SELFIE = LXEYBX, then PHYSICS = ____

Rampal told Arjun, "Yesterday I defeated the only brother of the daughter of my grandmother." Whom did Rampal defeat?

Select the related word/letters/number from the given alternatives.
Donkey : Brays :: Monkey : ?