How many times do a clock's hands overlap in a day ?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

You can hear me, but you can't touch or see me.

What am I?

What is the longest word in the dictionary?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Who is that with a neck and no head, two arms and no hands? What is it?

Can you count the number of triangles in the picture below?

How many sides does a circle have?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

What does this simple rebus mean?