What country can make you shiver?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Prove that twice of ten is the same as twice of eleven.

Count the Triangle in the figure given below:

What do you answer even though it never asks you questions?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

There is a family that live in a round house. The two parents go out for a movie and leave a babysitter to watch their son. They come back and the kid was not there. Some one kidnapped him. The maid said she was cleaning in a corner. The cook said he was making pizza. The babysitter said she was getting a board game. Who kidnapped him.

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

An old Woman left INR 33,333 to be divided equally among two fathers and two sons and each was to receive INR 11,111.
How was this possible?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?