John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

In the four images below, can you find the odd one out?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

There is something which is always coming but never arrives?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

Which number should replace the question mark?

Alex is stranded on an island covered in forest.
One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alex survive the fire? (There are no buckets or any other means to put out the fire)

Can you name some countries which do not have the alphabet 'A' in them?

Why are all black people so quick ?