Hard riddle

Nothing on the Outside
Riddle:
Nothing on the outside Nothing on the inside Light as a feather Yet ten men cannot lift it. What is it?
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I'm as Plain to See
Riddle:
I'm as plain to see as black & white. I prefer to roam about at night. Just don't attack or startle me. Or odiferous emissions may result you see. I'm an omnivore yes it's true. But what's my name tell me do?
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While Walking Down
Riddle:
While walking down the street I met a man. He tipped his hat and drew his cane and in this riddle I told his name. What is the man's name?
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All Colors of the Rainbow
Riddle:
I can be all colors of the rainbow, Or have no color at all. Sometimes I'm empty, Sometimes I'm full. What am I?
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Has Eyes but Can't See
Riddle:
What has eyes but can't see, a tongue but can't talk, and a soul but can never find love?
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Dark with White
Riddle:
Dark with white markings, And smooth like a rock. Where learning occurs, I help convey thought. What am I?
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Half a Hole
Riddle:
If it takes 3 people to dig 1 hole how many people does it takes for 1/2 an hole?
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Climb Mountains
Riddle:
What can climb mountains, cross streams, handle hundreds of feet each day, yet never moves? What is it?
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My Name is...
Riddle:
My name is two letters. You call many people by this name, but yet their first name is not this. What is it?
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White Bird
Riddle:
White bird, featherless, flyin' out o' paradise, flyin' over sea and land, dyin' in my hand. What is it?
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A Simple Peasant
Riddle:
A simple peasant bought a number of camels and is taking them to his farm. As he rides contentedly along he counts them - he counts 29. He was sure he had bought 30 camel, so in alarm he jumps off his camel and counts the camels again. To his delight there are 30. Half an hour later, he counts his camels and once more there are just 29. Confused, he climbs off his camel and counts again. Once more there are 30. Can you explain?
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There is a Frog
Riddle:
There is a frog, dead in the middle of an island. If he swims north, the distance to the mainland is 2 meters. If he swims south, the distance to the mainland is 3 meters. If he swims east or west, the distance is 4 meters. Which way does he swim?
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Teeth are Sharp
Riddle:
My teeth are sharp, my back is straight, to cut things up it is my fate. What am I?
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Where in the World?
Riddle:
Where is the AD before BC, tomorrow before yesterday, and the eight is first?
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Tongue is Long
Riddle:
My tongue is long, my breath is strong, And yet I breed no strife; My voice you hear both far and near, And yet I have no life. What am I?
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Bridle, Saddle, Straddle
Riddle:
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see. What am I?
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Good and Evil
Riddle:
Duels of good and evil, A fighter of good am I, Revealed beside watched words, King of the black night sky. What am I?
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Which English Word
Riddle:
Which word in the English language becomes shorter when it is lengthened?
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Rock and Roll
Riddle:
Rock and roll, rock and roll. What rocks but does not roll?
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Poke your Fingers
Riddle:
Poke your fingers in my eyes and I will open wide my jaws. Linen cloth, quills, or paper, my greedy lust devours them all. What am I?
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Mary's Father
Riddle:
Mary's father has five children. They are Nana, Nene, Nini, and Nono. What is the fifth childs name?
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Often Returned
Riddle:
What is often returned but never borrowed?
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Used to Threaten
Riddle:
Used to threaten, used to defeat. Sometimes it grows, sometimes it shrinks. Used to conquer, used to protect. It marks your downfall, it marks your success. The true god of war, the creator of mess. What is it?
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Throw Me Away
Riddle:
You throw me away, I find my way back; Traditionally I'm wooden, With an arch in my back. What am I?
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Next Number
Riddle:
What is the next number in the sequence? 2, 3, 5, 9, 17, _
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Often Held
Riddle:
Often held but never touched, always wet but never rusts, often bites but seldom bit, to use me well you must have wit. What am I?
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The Law of Gravity
Riddle:
Why can't you trust the law of gravity?
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I am the Only Thing
Riddle:
I am the only thing that always tells the truth. I show off everything that I see. I come in all shapes and sizes. So tell me what I must be! What am I?
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When I am Filled
Riddle:
When I am filled I can point the way, When I am empty nothing moves me, I have two skins, one without and one within. What am I?
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What Has no Hands
Riddle:
What has no hands but might knock on your door, and if it does you better open up?
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