What does this below rebus puzzle mean?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

what does this picture(rebus) riddle means ?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?