Verbal Reasoning - Mental Ability Questions

The weights of 4 boxes are 20, 40, 60 and 90 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?

If Quarantine : Isolation, then Freedom : ___

In the following question, select the related number from the given alternatives.
243 : 578 : : 163 : ?

If A denotes −, C denotes ×, D denotes ÷, E denotes +, then 14C3A12E4D2=?

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

Abcd, ghIJ, Mnop, stUV, Yzab, ?

Select the related word/letters/number from the given alternatives. AIDS : VIRUS : : MALARIA : ?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
_cca_a_ca_ac_ab

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

master, ember, bombay, animal, abdomen, ?