Riddle: I have a little house in which I live all alone. It has no doors or windows, and if I want to go out I must break through the wall. What am I?
Answer: A chick in an egg.
Riddle: I'm in the book, but not on any leaf; I'm in the mouth, but not in lip or teeth; I'm in the atmosphere, but never in the air; I wait on every one, but never on a pair; I am with you wherever you may go; And every thing you do I'm sure to know; Though when you did it I should not be there, Yet when 'twas done, you'd find me in the chair. What am I?
Answer: The letter O.
Riddle: There were five men going to church and it started to rain. The four that ran got wet and the one that stood still stayed dry. How did the one stay dry?
Answer: It was a body in a coffin with the bearers.
Riddle: It's been around for millions of years, but it's no more than a month old. What is it?
Answer: The moon.
Riddle: It stands on one leg with its heart in its head. What is it?
Answer: A cabbage.
Riddle: There are four brothers in this world that were all born together. The first runs and never wearies. The second eats and is never full. The third drinks and is always thirsty. The fourth sings a song that is never good. What are the four brothers?
Answer: Water, Fire, Earth, and Wind.
Riddle: What number, when added separately, to 100 and 164 can make each a perfect square?
Answer: The answer is 125. 125+100=225 and 125+164=289.  The square root of 225 is 15 and the square root of 289 is 17.
Riddle: You're in a magical bathroom with no windows and the only way things can get in and out is by an open door. You decide to have a bath so you turn on the tap, you shut the door and the handle breaks so you can't open it, you then turn off the tap and the knob breaks so water keeps coming. How do you save yourself from drowning?
Answer: Pull out the plug in the bath.
Riddle: Why is the letter F like death?
Answer: Because without it life is a lie, or it makes life a lie.
Riddle: You pick it, You peel the outside, You cook the inside, You eat the outside, And throw away the inside. What is it?
Answer: An ear of corn.