Riddle: This thing all things devours: Birds, beasts, trees, flowers; Gnaws iron, bites steel; Grinds hard stones to meal; Slays king, ruins town, And beats high mountain down. What am I?
Answer: Time!
Riddle: I am a word of three syllables, each of which is a word; my first is an article in common use; my second, an animal of uncommon intelligence; my third, though not an animal, is used in carrying burdens. My whole is a useful art. What am I?
Answer: Pen-man-ship.
Riddle: Four letters form me quite complete, As all who breathe do show; Reversed, you'll find I am the seat Of infamy and woe. Transposed, you'll see I'm base and mean, Again of Jewish race; Transposed once more, I oft am seen To hide a lovely face. What are the five words?
Answer: Live, evil, vile, Levi, veil.
 
Classic Riddles
Riddle: General Gasslefield, accused of high treason, is sentenced to death by court-martial. He is allowed to make a final statement, after which he will be shot if the statement is false or will be hung if the statement is true. Gasslefield makes his final statement and is released. The Question: What could he have said?
Answer: General Gasslefield said: "I will be shot." If this statement was true, he would have been hung and thus not be shot. But then his statement would be false, which implies that he should be shot, making the statement true again, etc... In other words: the verdict of the court-martial could not be executed and the general was released.
Riddle: Why would Snow White be a good judge?
Answer: Because she's the fairest in the land.
Classic Riddles
Riddle: How high would you have to count before you would use the letter A in the English language spelling of a whole number?
Answer: One thousand.
Riddle: I am a word of five letters. Take away my first and I am the name of what adorns the estate of many of the nobility of England. Take away my first and second, and I am the name of a place where all the world was once congregated. Take away my last, and I am the name of a beautiful mineral. Take away my two last, and I am the name of a fashionable place of resort. I am small in stature but capable of doing a great deal of mischief, as I once did in London in the year 1666. What word am I?
Answer: Spark.
Classic Riddles
Riddle: I build up castles. I tear down mountains. I make some men blind, I help others to see. What am I?
Answer: Sand.
Riddle: Formed long ago, yet made today, Employed while others sleep. What none would freely give away. Nor any wish to keep. What is it?
Answer: A bed.
Riddle: What gets bigger the more you take away?
Answer: A hole.
Riddle: My first is a part of the day, My last a conductor of light, My whole to take measure of time, Is useful by day and by night. What am I?
Answer: An Hour-glass.
Riddle: As I was walking across the London Bridge, I met a man who tipped his hat and drew his cane, and in this riddle, I said his name. What is it?
Answer: And drew = ANDREW.
Riddle: A dagger thrust at my own heart, Dictates the way I'm swayed. Left I stand, and right I yield, To the twisting of the blade. What am I?
Answer: A Lock.
Riddle: Why is green grass like a mouse?
Answer: Green grass is like a mouse, because the cattle eat it (cat’ll eat it).
Riddle: What creature has one voice, but has four feet in the morning, two feet in the afternoon, and three feet in the evening?
Answer: Man crawls on all fours as a baby, walks on two as an adult, and needs a walking cane when old.  The Sphinx posed this riddle to Oedipus who solved the riddle correctly.
Riddle: In camps about the centre I appear; In smiling meadows seen throughout the year; The silent angler views me in the streams, And all must trace me in their morning dreams, First in the mob conspicuous I stand, Proud of the lead, and ever in command. What am I?
Answer: The letter M.
Riddle: Name a five letter word which has three consonants all the same and two different vowels. Every now and then you see this while running a Windows 95/98 on your PC. What is it?
Answer: Error!
Riddle: I saw a creature: his stomach stuck out behind him, enormously swollen. A stalwart servant waited upon him. What filled up his stomach had travelled from far, and flew through his eye. He does not always die in giving life to others, but new strength revives in the pit of his stomach; he breathes again. What is he?
Answer: Bellows.
Riddle: Make me thy lyre, even as the forests are. What if my leaves fell like its own -- The tumult of thy mighty harmonies Will take from both a deep autumnal tone. What am I?
Answer: The west wind.
Riddle: What has to be broken before you use it?
Answer: Eggs.