Can you count the number of triangles in the picture below?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

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?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Which is the correct shadow of the bird?

What demands an answer, but asks no questions

People make me, save me, change me, raise me. What am I?