As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

What word is pronounced the same if you take away four of its five letters?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

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 goes up but never comes down?

What kind of band never plays music?

How is a fly different from a mosquito?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?