Okay, I'll post a few just in case you've heard some before. Keep in mind they're mostly for children.
Starting of easy:
1. You have a basket with 3 apples, and you take 2; How many apples do you have?
2
2. A police has a brother, but the brother doesn't have a brother. How come? pass
3. An elk was going to a river to drink some water, on his way there he met 3 bears. On top of each bear there was a fox, and on the back of each fox there was a bird. How many animals were going to the river to drink some water?
1
4. Two men were coming home from a market, when they got home they were greeted by two women who said "Here comes our men, our mothers' men, our fathers and our childrens' fathers." How can this be?
grandfather
5. When you know what I am, I don't exist. When you don't know what I am, I exist. What am I?
air
6. There are 4 lit candles on a table, how many should you blow out to only let there be one left? pass
7. A boy and a girl were playing chess. They played five times. There were no draws and they both won equally many rounds. How come?
the 5th game wasn't done yet
Final one which I know the answer to, but I don't know WHY this is the answer.
X. On a photograph there was a grandmother, two mothers, two sisters, one grandchild, one aunt and one niece. How many people are there on the photograph?
1, the grandmother is soo fat, the others can't get on the picture.
I used to have like a million books with riddles which I always used to bug my friends with. But at last no one even bothered to answer them, which made my threw said books away. Which is why I only remember riddles for children. ^^
Let's pretend it's on topic.
Guys, I heard of this awesome anime full of riddles and stuff, let's see how well you'll do on these!
Have fun!