Verbal Reasoning - Mental Ability Questions

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
49, 64, ?, 100, 121

In this question, some equations are solved on the basis of a certain system. On the same basis find out the correct answer from amongst the four alternatives for the unsolved equation.

53 ­ 34 = 5334
65 ­ 46 = 6456
75 ­ 24 = ?

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

56 ÷ 8 + 12 - 72 = ?

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

0.5, 2, 3.5, ? , 6.5

Select the related word/letters/number from the given alternatives.
841 : 29 :: 289 : ?

Select the related word from the given alternatives.
Plane : Pilot :: Ship : ?

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

BCF, CFI, DHL, ?

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

144, 256, 400, ?