why number 8549176320 is one of a kind?

What does this rebus photo means?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

Which letter of the alphabet has the most water?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

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

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes