Verbal Reasoning - Mental Ability Questions

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?

x_zz_xx_z_yx

Select the related word/letters/numbers from the given alternatives: 6 : 42 :: 12 : ?

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

The weights of 4 boxes are 10, 40, 50 and 80 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes and in a combination a box can be used only once?

In the following question, select the missing number from the given options?

If A denotes '+', B denotes '-', C denotes '/', D denotes 'x' then the value of the expression 9 D 48 C 6 B 16 A 3 is

In a certain code language, “TOLDER” is written as “WSQGIW”. How is “SPIRAL” written in that code language?

In the following question, select the missing number from the given series.

2, 5, 12, 27, ?