Why 1729 is a magic number? Answer Logically.

Can you count the number of triangles in the picture below?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

A father's child, a mother's child, yet no one's son.

Who am I?

What has a ring but no finger?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

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?

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?