What is the longest word in the dictionary?

I look at you, you look at me, I raise my right, you raise your left. What am I?

If eleven plus two equals one, what does nine plus five equal?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Which is faster, Heat or Cold ? Explain.

I am white when I am dirty, and black when I am clean. What am I?

I can be cracked, made, told, and played. What am I?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

What has many teeth, but cannot bite?