Answer:
What word of five letters has only one left when two letters are removed?
What always comes into the house through the keyhole?
Why is 6 afraid of 7?
Take one royal word in the plural and make it singular by adding one letter
I can be as thin as a picture frame but my insides have many things you can see.
Two little holes in the side of a hill. Just as you come to the cherry-red mill.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?