How many bananas can you eat if your stomach is empty?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

When monkey rotate the gear, which mark will be hit 1 or 2 ?