I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

What number do you get when you multiply all of the numbers on a telephone's number pad?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Name a key which is hardest to turn.