why number 8549176320 is one of a kind?

I am the fastest animal but cannot climb the tree. What am I?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

What does this rebus riddle mean?

What does this mean?

CCCCCCC

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

What is the word or phrase below?
R | E | A | D

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?