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Rubik’s Cube

Rubik’s Cube
Enjoy it!

Wu Xiangchun, Listening & Speaking Class 7

Rubik’s Cube

Introduction
? Have you seen this cartoon?

Rubik’s Cube

Outline
1 2
Origin of the Cube

Types of the Cube

3
4 5

3-Order Rubik’s Cube

Solutions of 3-Order Cube

Competition & Records

Rubik’s Cube

1.Origin ?In 1974 ?By Hungarian sculptor and professor of architecture Ern? Rubik

Rubik’s Cube

1.Origin
? Aim to help his students to improve the ability of spatial thinking ? Originally called Magic Cube

Rubik’s Cube

2.Types & Variations
? Different types of the original Rubik’s Cube
? All derived from the original Rubik’s Cube(3x3x3)

Rubik’s Cube

Types
2-order

7-bands 4-order

3-Order

5-bands

6-bands

Rubik’s Cube

Variations
? Have you ever seen these variations of Rubik’s Cube?

Rubik’s Cube

3.Original Rubik’s Cube
? 3x3x3 Cube

Rubik’s Cube

3.Original Rubik’s Cube
? 6 faces, 8 corners and 12 edges ? 8! ways to arrange the corner cubes ? 38/3 orientations of the corner cubes ? 12! /2ways to arrange the edge cubes ? 212 orientations of the edge cubes ? So, the totality of permutations are:
8!? 38 ?12!? 212 ? 43, 252, 003, 274, 489,856, 000 ? 4.33 ?1019 2? 2?3

Rubik’s Cube

4.Solutions
Solution= the recovery of a disordered Rubik’s Cube
Fundamental method Petrus method Bridge method

Lay-by-layer is the fundamental method. Solve the Cube layer by layer, in which one layer is solved first, followed by the middle layer, and then the final layer.

A 2×2×2 section is solved first, followed by a 2×2×3, and then solve the incorrect edges and corner.

Solve the opposite two face, and then to recover the whole cube.

Rubik’s Cube

4.Solutions
? CFOP—An advanced solution derived from the Layer-by-layer ? C—Cross ? F—First two layers(F2L) ? O—Orientation of the last layer(OLL) ? P—Permutation of the last layer(PLL) ? Nearly 119 formulas to remember

Rubik’s Cube

5.Competition & Records
? There are many ways to compete ? Speedcubing: Solve the cube in the shortest time ? Blindfolded solving: Solve the cube after watching the disordered cube for some time (this time is also included in the total time) ? Solve the cube with one hand ? Solve the cube with one’s feet

Rubik’s Cube

5.Competition & Records Some world records:
Item Speedcubing Blindfolded One hand Holder Erik Akkersdijk Zhuang Haiyan Gunnar Krig Chang JeeHoon Jimmy Coll Record 7.08s 35.96s 13.80s Nationality Holland China Sweden

Feet
Least Step

36.94
22steps

Korea
Belgium

Rubik’s Cube

6. Special introduction
? Rubik’s Cube is not only for children, but also for other different people ? Solve the cube usually will be beneficial to our brain ? Some websites recommended:
Rubik’s official website: http://www.rubiks.com/ Mofang8: http://www.mf8.com.cn/ Rubik’s Cube CHINA: http://www.rubik.com.cn/

Rubik’s Cube

Wu Xiangchun, Listening & Speaking Class 7


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