Verbal Reasoning - Mental Ability Questions

In the following question, select the related number from the given alternatives.
40 : 100 : : 56 : ?

Find the odd word/letters/number pair from the given alternatives.
(A) ZVR
(B) ZYX
(C ) QMI
(D) IEA

A is taller than B, who is shorter than C, but taller than D. Who is the shortest?

Teacher is related to Class in the same way Driver is related to

Suraj is shorter than Gopal but taller than Tarun. Rajan is the tallest and Shivam is shorter than Suraj but not the shortest. Who is the third shortest?

In the following question, select the related letter/letters from the given alternatives.

CPR : ERT : : DQS : ?

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

XXXXXO, XXXXOX, XXXOXX, XXOXXX, XOXXXX, ?

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

45 x 5 - 24 + 3 ÷ 80 = ?