Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Why is the Hole below a Lock?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

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

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

What does a man do only once in his lifetime, but women do once a year after they are 29?

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

Can you spot the hidden girl in the picture below?