What does this Rebus Picture means ?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Find out the missing number in the picture attached:

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

What do you answer even though it never asks you questions?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Identify The phrase in the picture.

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

What four weights can be used to balance from 1 to 30 pounds?