What is next number in the pattern below:

131 517 192 123 ?

Count the squares in the matchstick puzzle below?

What demands an answer, but asks no questions

You need to remove two matchsticks to make the below equation true. Can you do it ?

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

What goes up but never comes down?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

I don't get anymore wetter, no matter how much rain falls on me.

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 always comes into a house through the keyhole?