Verbal Reasoning - Mental Ability Questions

How many meaningful English words can be formed with the letters ESRO using each letter only once in each word?

Introducing a man, a woman said, 'He is the only son of my mother's mother." How is the woman related to the man ?  

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

4, 5, 12, 39, 160, ?

Answer the questions based on the below information.

If '+' is 'x', '-' is '+', 'x' is '/' and '/' is '-' then 6 - 9 + 8 x 3 / 20

From the given alternatives, according to dictionary, which word will come at THIRD position?

1. Doubled

2. Dragged

3. Doubling

4. Dragging

5. Draw

Select the related word/letters/numbers from the given alternatives:

BFJ : NRV :: DHL :?

Select the related number from the given alternatives.

55 : 11 :: 125 : ?

Select the related word/letters/number from the given alternatives.

Gambler : Casino : : Clerk : ?