A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Which word does the below Plexor means ?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?