Verbal Reasoning - Mental Ability Questions

The weights of 4 boxes are 90, 40, 80 and 50 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?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
1, 7, 42, 210, 840, ?

Select the missing number from the given responses:

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

EF, GI, IL, KO, ?

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

GLN, HNQ, IPT, JRW, ?

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
Nightwalker

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

MEASUREMENT

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

ajs , gpy , ? , sbk , yhq