You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Find the next number in the series below

21 32 54 87 131 ?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

What word does this rebus represent?

meta meta
meta meta

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

What is at the end of a rainbow?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

what does the below math rebus puzzle mean?