What has no start, end, or centre?

Count the Triangle in the figure given below:

A blonde put eyeliner on her head. Why?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

Can you find out which number multiplied by itself will give the output as 12345678987654321?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

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

Why did the Girl throw the butter out of the window?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()