Verbal Reasoning - Mental Ability Questions

What is the next number in the series

4, 8 , 8, 16, 12, 24, __

The positions of the first and sixth digits in the number 5109238674 are interchanged. Similarly the positions of the second and the seventh digits are interchanged and so on . which of the following will be the third digit from the right end after the after the rearrangement?

Use the following passage for the questions based on it.

There are 6 flats on a floor in two rows. Out of these, three are north facing and the other three are south facing flats. The flats are to be allotted amongst Arun, Biswajyot, Chitra, Derek, Evan, and Fatima. Biswajyot gets a north facing flat and is not next to Derek. Derek and Fatima get diagonally opposite flats. Chitra is next to Fatima, and gets a south facing flat. Evan gets a north facing flat.

Except Derek and Fatima, which other pair is diagonally opposite to each other?

In the following question, one term in the number series is wrong. Find out the wrong term?

5, 10, 40, 80, 320, 550, 2560

In the following question, select the odd word from the given alternatives.

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

147, 149, 152, 156, 161, ?

Showing a man a woman said, "His brother's father is the only son of my grandfather". How is the woman related to the man? 

Library is to Book as Book is to