What number should come in place of the question mark below?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

How many triangles can you count in the figure given?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?

Why is it very easy to weigh a fish?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

what does the below math rebus puzzle mean?

A man is found hanging dead from the ceiling of a room. The room’s dimensions are 15 x 15 x 15. The man is only 6ft tall and the rope was only 2ft long. There are no windows and only one door to the room. The door is bolted shut from the inside, and a puddle of water is under the man. How did he kill himself?

Which part of London exists in France as well ?