what does the below rebus means?

What is the fastest way to double your money?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

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?

Which city is three-fifths chick two third cat and 50% goat?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

What runs around the whole yard without moving?

What is red and smells like blue paint?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

Can anyone tell me a word in the English dictionary which has a silent 'z'?