A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

Count the number of triangles in the below picture?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

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?

What can go through glass without breaking it?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

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

How many sides does a circle have?

Can you count the number of triangles inside a triangle?