Find the missing letter in the last circle logically in the given below picture.

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

When it's bad luck to meet a black cat?

Why is Saturday stronger than Monday?

How can you leave a room with two legs and return with six legs?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

What is the word or phrase?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?