##### Easy Riddle #98 (hard)

Question: Suppose you're on a game show, and you're given the choice of three doors: Behind one door is a sports car; behind all of the others is bicycles. You pick a door, say No. 1, and the host, who knows what's behind the doors, opens another door, say No. 2, revealing a bicycle. He then says to you, "Do you want to pick door No. 3?" Is it to your advantage to switch your choice?

##### Easy Riddle #266 (hard)

Question: You have a cup of tea (A) and a cup of coffee (B) (equal amounts), and you take a spoonful of the coffee (B) and mix it thoroughly into the tea (A). Then you take a spoonful of tea (A) and mix it with the coffee (B). Does the cup that originally had tea in it (A) have more coffee or does the cup that originally had coffee in it (B) have more tea?

##### Easy Riddle #203 (hard)

Question:

You have a large number of friends coming over and they all get thirsty. Your first friend asks for 1/2 a cup of water. Your second friend asks for 1/4 a cup of water. Your third friend asks for 1/8 a cup of water, etc.

How many cups of water do you need to serve your friends?

##### Easy Riddle #207 (hard)

Question:

John has some chickens that have been laying him plenty of eggs. He wants to give away his eggs to several of his friends, but he wants to give them all the same number of eggs. He figures out that he needs to give 7 of his friends eggs for them to get the same amount, otherwise there is 1 extra egg left.

What is the least number of eggs he needs for this to be true?

##### Easy Riddle #485 (hard)

Question: My first is often at the front door.
My second is found in the cereal family.
My third is what most people want.
My whole is one of the united states.

What am I?