Before Mount Everest was discovered, what was the highest mountain in the world?

Why 1729 is a magic number? Answer Logically.

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

How many times can you subtract the number 5 from 25?

I am the fastest animal but cannot climb the tree. What am I?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

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?

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?