What you cannot hold but it is yours?

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

What am I?

John is pretty weird. He likes toffees but hates chocolates. He loves books but never reads. He likes to build his troops in an online game but does not proceed with the war. He likes to go swimming but is afraid of water.

Seeking this behaviour, can you tell whether he likes balloons and parties?

What is the riddle which can be asked all day with a different correct answer each time.

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

No matter how little or how much you use me, you change me every month. What am I?

Count the squares in the matchstick puzzle below?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

what does this picture(rebus) riddle means ?