Verbal Reasoning - Mental Ability Questions

If 4 cats can kill 4 rats in 4 minutes, how many minutes will it take 8 cats to kill 8 rats?

A girl introduces a man as the son of her grandfather and the brother of her maternal aunt. How is the man related to the girl?

Select the related word/letters/number from the given alternatives.
30 : 16 :: 24 : ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
CEG, IKM, OQS, ?

A series is given, with one word missing. Choose the correct alternative from the given ones that will complete the series.
rupees, arena, pursue, spare, separate, ?

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

Brazil, Russia, ? , China, South Africa

Which of the following interchanges in signs and numbers will make the given equation correct?
7 x 9 + 5 = 68

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