I make two people out of one. What am I?

What is more useful when it is broken?

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

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

Aaron, Brad, Christopher, Danny and Elvis decided to play a game of tiddlywinks. In this game they decided that one win will get 1 point for winning, 0 for losing and 1/2 in case of a tie.

They finished the game in alphabetical order and it was found that the scores were different for each person.

Based on the following two statements, can you find out the result of the individual games?
Brad: No one could finish like me, without a loss.
Elvis: No one played worse than me, I finished without a single win.

If eleven plus two equals one, what does nine plus five equal?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Identify the hidden meaning behind this picture?