Which part of London exists in France as well ?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

People put me on the table and cut me but do not eat me. What am I?

What number when divided in half becomes zero?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

What do you call a fish without an eye?

What runs around the whole yard without moving?

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?