Stage 1 and stage 2 consist of eqsy questions with hints,
stage 3,4,5,6 consists of basic questions,
and stage 7,8,9 consits of development difficult questions.
If you can't solve the questions, you can ask your firends via twitter or facebook.
Plane figure are drawn on 8x8 square.
The area of the 1x1 square is 1.
Please solve the areas of the color is painted.
Π is pi (3.1415 ...).
You can write notes on the screen with your finger.