Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

The answer I give is yes, but what I mean is no. What was the question?

I am white when I am dirty, and black when I am clean. What am I?

When can we add 2 to 11 and get 1 as the correct answer?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

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

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?