By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

There is something which you can be arrested for attempting but not for successfully completing.

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 count the number of triangles in the picture below?

Solve the puzzle by telling what does below picture means.

Which number should replace the question mark?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

James bond was pushed out of an aeroplane without any parachute.
He survived, How come?

A devotee visits 9 temples when he visits India. All these nine temples have one thing in common - there are 100 steps in every temple. The devotee puts the Re.1 coin after climbing up every step. He does the same while climbing down every step. At each temple, the devotee offers half of his money from his pocket to god. In this way, his pocket becomes empty after he visits the 9th temple.

Can you calculate the total amount he had initially?