I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

What has many keys but can’t open a single lock?

If you say my name, I will no longer exist. What am I?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

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?

How many times can you subtract the number two from the number fifty?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?