why number 8549176320 is one of a kind?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Can you find a five letter word that is left with only two letters if one is removed?

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

Imagine you are in a room with no windows or doors. How will you get out?

How can one talk without saying a single word?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G