Can you start the fire using two pieces of wood?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

Count the number of triangles in the given picture.

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)

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

A sundial has the fewest moving parts of any timepiece. Which has the most?

Which country gets ill every time?

Prove that twice of ten is the same as twice of eleven.