Brain Teasers (hard)

Which is heavier? A pound of feathers or a pound of rocks?

A plane crashes on the border of the U.S. and Canada. Where do they bury the survivors?

A man pushes his car to a hotel and tells its owner that he is bankrupt. Why?

Which is correct to say: "The yolk of the egg is white" or "The yolk of the egg are white?"

You are going to St.Ives, on the way you meet a man with 7 sacks, each sack has 7 cats, how many are going to saint Ives

A boy is walking down the road with a doctor. While the boy is the doctor’s son, the doctor is not the boy’s father.

Your parents have six sons including you and each son has one sister. How many people are in the family?

Many have heard me, but nobody has seen me. I will not speak until spoken to first. What am I?

There are 10763 apples, you take 105, how many do you have now.

Which travels faster? Hot or Cold?

What can you hold without ever touching or using your hands?

What has a mouth, but cannot eat; moves, but has no legs; and has a bank, but cannot put money in it?