Verbal Reasoning - Mental Ability Questions

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

Select the related word/letters/numbers from the given alternatives:
ECFG : FDGH :: SQTU : ?

Select the missing number from the given alternatives?

The number of letters that are preceded by a symbol but not followed by a number in the given expression is ___.

SM@A#N2B4O&3C5P+D2

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

x_zz_xx_z_yx

From the given alternative words, select the word which cannot be formed using the letters of the given word :

ORGANISATION

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

Qutb­ud­din Aibak, Iltutmish, ?, Ghiyas­ud­din Balban

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?