Riddle: Five hundred begins it, five hundred ends it, five in the middle is seen; first of all figures, the first of all letters, take up their stations between. Join all together, and then you will bring before you the name of an eminent king. Who is it?
Answer: DAVID (Roman numerals).
Riddle: My first is found on the ocean wave, In the spring, the pit, and the mine; My second below earth's surface you have, Where seldom the sun can shine. My whole your dinner-table must grace, And seldom fails to obtain a place. What am I?
Answer: Salt-cellar.
Riddle: Where do Turkeys go to dance?
Answer: The Butter Ball.
Classic Riddles
Riddle: What animal probably likes doors?
Answer: A doormouse.
Riddle: Why are trees in winter like troublesome visitors?
Answer: Because it's a long time before they leave.
Classic Riddles
Riddle: Three-fourths of a cross, and a circle complete, An upright where two semicircles meet, A rectangle triangle standing on feet, Two semicircles, and a circle complete. What is it?
Answer: The word Tobacco.
Riddle: There is one word in the English language which is universally considered a preventive of harm; change a certain letter in it, and you make it an act of cruelty. What are the words?
Answer: Prescription—proscription.
Classic Riddles
Riddle: What do bumblebees sing in the shower?
Answer: BeeBop.
Riddle: Half-way up the hill, I see thee at last. Lying beneath me with thy sounds and sights - A city in the twilight, dim and vast, With smoking roofs, soft bells, and gleaming lights. What is it?
Answer: The past.
Riddle: There is a creature which could double its size every day. So, if the creature is put in a tank then it will fill the tank in 10 days. How many days would it take for the creature to fill 1/2 and 1/4 of the tank?
Answer: 9 days to fill 1/2 and 8 days to fill 1/4 of the tank.  If the creature fills the tank in 10 days and it doubles every day, on the ninth day it would fill 1/2 the tank. Thus on the 8th day it will fill 1/4 of tank.
Riddle: Runs over fields and woods all day Under the bed at night sits not alone, With long tongue hanging out, Awaiting for a bone. What am I?
Answer: A shoe.
Riddle: Why was the dog kicked out of the flea circus?
Answer: Because he stole the show!
Riddle: How do you make an orange giggle in the tub?
Answer: Tickle its navel.
Riddle: What do computer programmers sing in the shower?
Answer: Disc-o.
Riddle: How do you communicate with a monster that lives on the seabed?
Answer: Drop him a line.
Riddle: Half of me will mend, the other half will imprison. When I am together, I will poison. Who am I?
Answer: Hemlock,
Riddle: My first may be fashioned of iron or wood,  And at window or door for safety is placed;  In village or town, it does more harm than good, Leading people their health, time, and money to waste. My second's a lady, bewitching and fair, And for love of her people will labor and strive; Will rise before dawn, and be wearied with care, And pursue her with ardor as long as they live. My whole is what ladies admire and approve, The shopkeeper's boast-the purchaser's prize; 'Tis a ninepenny chintz-'tis a one-shilling glove- It is something which makes people open their eyes. What am I?
Answer: Bar-gain.
Riddle: Did you hear about the soilder who bought a camouflage sleeping bag?
Answer: He can't find it
Riddle: 'Tis found in our troubles, 'tis mixed with our pleasures, 'Tis laid up above with our heavenly treasures; 'Tis whispered in heaven, and 'tis muttered in hell, And it findeth a place in each sybilline spell; In Paradise nestled, 'mid Eden's fair flowers, It has sported with Eve in rose-perfumed bowers; 'Tis muttered in curses, yet breathed in our prayers; From the path of our duty it tempts us in snares. Deep, deep in our hearts you will find it engraved; Though in misery sunk, yet from sin it is saved. 'Tis found in the stream that flows on to the ocean; Though in bustle forever, 'tis ne'er in commotion. 'Tis wafted afar o'er the land in each breath; In the grave 'tis decaying-you'll find it in death. It is floating away on the broad stream of time, Yet it findeth a place in eternity's clime. In the legends of nations it holdeth a place; There's no charm without it to the beautiful face. In thunder you'll hear it, if closely you listen; In moonbeam and sunbeam forever 'twill glisten. In the dew-drop it sparkles; 'tis found in the forest; It whispers in peace when our need is the sorest. What am I?
Answer: The letter E.
Riddle: Untainted, Eternal, Marooned A place where the living will move. A shrine beneath the sun. Greeted by the morning's crest. Our sanctity, Our rest. For when our day is done. What am I?
Answer: A Graveyard.