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

What does a man do only once in his lifetime, but women do once a year after they are 29?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

What happened when the wheel was invented?

I am the fastest animal but cannot climb the tree. What am I?

What runs around the whole yard without moving?

What am I?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?