What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

why number 8549176320 is one of a kind?

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

I am sometimes honest
Sometimes dishonest
I can be sweet and also bitter
I can hurt you real bad and
also make u smile and blush ☺️
What am I?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

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

I’m tall when I’m young, and I’m short when I’m old. What am I?