why number 8549176320 is one of a kind?

Which tank will fill first?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

There are forty elephants and they have forty-fore heads. How can this be possible?

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

A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

Near the dead body, they find a few numbers written with blood by the victim on the floor. The numbers are 8, 5, 4, and 11.

The police arrests one of the friends for the murder. Whom did they arrest and why?

Can you find the number of triangles in the given figure?

Solve the counting riddle by identifying the number of triangles in the given picture.

I have eight fingers and two thumbs but I do not live. What Am I?