Can you calculate the probability of getting a sum of six when a dice is thrown twice?

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

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

What runs around the whole yard without moving?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

What do you get if you add 2 to 100 four times?

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

A girl rode into a tourist spot out of the city on Thursday. She loved the place and decided to stay for a few days. She stayed for four days and then she left for back home on Thursday.

How can this be possible?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?