What are the ways to put the puzzle?

The final * * * is 536 different spellings.

Puzzle toy, also called T-puzzle, is a traditional intellectual toy similar to jigsaw puzzle. A jigsaw puzzle consists of four irregular shapes decomposed from a rectangle (the capital word "one" in the puzzle).

Among them, there are right-angled trapezoid, isosceles right-angled triangle and concave Pentagon of different sizes. Except for right angles, the internal angles of these polygons are all 45? 、 135? There are still 270? Angle. It is said that it is the most difficult to put the puzzle into a capital "T" letter shape.

introduce

A jigsaw puzzle originated in China and is called "Doctor Board" in Japan, because it is not only used as a toy for extracurricular activities, but also used to test intelligence. According to the difficulty of the puzzle, it is divided into nine levels: infant level, infant level, primary school level, senior middle school level, junior middle school level, senior middle school level, specialist level, university level and doctor level.

In other words, if you can spell the hardest number, you can reach the doctor's intelligence. This kind of puzzle has another name in Japan, which means "Liu's mystery". China was called blending board in ancient times, which means that tiles are very harmonious; In the west, it is called the T-board because it can spell a T-word.