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Uwe Mèffert
Uwe Mèffert (born 28 November 1939)[citation needed] has manufactured and sold mechanical puzzles in the style of Rubik's Cube
Rubik's Cube
since the original Cube craze. His first design was the Pyraminx
Pyraminx
and others include the Megaminx, Skewb
Skewb
and Skewb
Skewb
Diamond.[citation needed] More recently he has licensed and re-released designs from other manufacturers, such as Dogic.[citation needed] In the 1970s Mèffert created some puzzles for his own amusement using pieces of balsa wood attached to a center ball by rubber bands.[citation needed] He did not think anyone else would be interested in them, and put them away and forgot about them until Ernő Rubik's Rubik's Cube
Rubik's Cube
became a worldwide sensation in the 1980s. In 1981 Mèffert took his puzzles to a Japanese toymaker who agreed to market them
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Switzerland
Switzerland
Switzerland
(/ˈswɪtsərlənd/), officially the Swiss Confederation, is a federal republic in Europe. It consists of 26 cantons, and the city of Bern
Bern
is the seat of the federal authorities.[1][2][note 1] The country is situated in Western-Central Europe,[note 4] and is bordered by Italy
Italy
to the south, France
France
to the west, Germany
Germany
to the north, and Austria
Austria
and Liechtenstein
Liechtenstein
to the east. Switzerland
Switzerland
is a landlocked country geographically divided between the Alps, the Swiss Plateau and the Jura, spanning a total area of 41,285 km2 (15,940 sq mi) (land area 39,997 km2 (15,443 sq mi))
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Germany
Coordinates: 51°N 9°E / 51°N 9°E / 51; 9Federal Republic
Republic
of Germany Bundesrepublik Deutschland (German)[a]FlagCoat of armsMotto:  "Einigkeit und Recht und Freiheit" (de facto) "Unity and Justice and Freedom"Anthem: "Deutschlandlied" (third verse only)[b] "Song of Germany"Location of  Germany  (dark green) – in Europe  (green & dark grey) – in the European Union  (green)Location of
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Helicopter Cube
A helicopter is a type of rotorcraft in which lift and thrust are supplied by rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward, and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of VTOL
VTOL
(vertical takeoff and landing) aircraft cannot perform. The English word helicopter is adapted from the French word hélicoptère, coined by Gustave Ponton d'Amécourt in 1861, which originates from the Greek helix (ἕλιξ) "helix, spiral, whirl, convolution"[1] and pteron (πτερόν) "wing".[2][3][4][5] English language nicknames for helicopter include "chopper", "copter", "helo", "heli", and "whirlybird". Helicopters were developed and built during the first half-century of flight, with the Focke-Wulf Fw 61
Focke-Wulf Fw 61
being the first operational helicopter in 1936
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Icosahedron
In geometry, an icosahedron (/ˌaɪkɒsəˈhiːdrən, -kə-, -koʊ-/ or /aɪˌkɒsəˈhiːdrən/[1]) is a polyhedron with 20 faces. The name comes from Greek εἴκοσι (eíkosi), meaning 'twenty', and ἕδρα (hédra), meaning 'seat'. The plural can be either "icosahedra" (/-drə/) or "icosahedrons". There are many kinds of icosahedra, with some being more symmetrical than others
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Mechanical Puzzles
A mechanical puzzle is a puzzle presented as a set of mechanically interlinked pieces.Contents1 History 2 Categories2.1 Assembly puzzles 2.2 Disassembly puzzles 2.3 Interlocking puzzles 2.4 Disentanglement puzzles 2.5 Fold puzzles 2.6 Lock puzzle 2.7 Trick vessels 2.8 Impossible objects 2.9 Dexterity puzzles 2.10 Sequential movement puzzle 2.11 Simulated mechanical puzzles3 Other notable mechanical puzzles 4 See also 5 ReferencesHistory[edit] The oldest known mechanical puzzle comes from Greece
Greece
and appeared in the 3rd century BC. The game consists of a square divided into 14 parts, and the aim was to create different shapes from these pieces. This is not easy to do. (see Ostomachion
Ostomachion
loculus Archimedius) In Iran
Iran
“puzzle-locks” were made as early as the 17th century AD. The next known occurrence of puzzles is in Japan
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Panagiotis Verdes
Panagiotis Verdes
Panagiotis Verdes
is the Greek inventor of the 6x6x6, 7x7x7, 8x8x8 and 9x9x9 Twisty Puzzles. He has also worked on new designs of every Twisty Puzzle from 2x2x2 to 11x11x11.[1] Inventions[edit]The V-Cube 6
V-Cube 6
in solved stateThe V-Cube 7
V-Cube 7
in solved statePrior to Verdes's invention, the 6x6x6 cube was thought to be impossible due to geometry constraints. Verdes's invention uses a completely different mechanism than the smaller Rubik's cubes; his mechanism is based on concentric, right-angle conical surfaces whose axes of rotation coincide with the semi-axes of the cube.[1] The patents for the cubes were awarded in 2004, and mass-production began in 2008. Verdes's mechanism allows cubes of up to size 11x11x11, as larger cubes have geometrical constraints.[1] References[edit]^ a b c Slocum, Jerry (2009). The Cube: The Ultimate Guide to the World's Bestselling Puzzle
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Hong Kong
Hong Kong
Hong Kong
(Cantonese: [hœ́ːŋ.kɔ̌ːŋ] ( listen)), officially the Hong Kong
Hong Kong
Special
Special
Administrative Region of the People's Republic of China, is an autonomous territory on the eastern side of the Pearl River estuary in East Asia. Along with Macau, Guangzhou, Shenzhen, Zhuhai, and several other major cities in Guangdong, the territory forms a core part of the Pearl River Delta
Pearl River Delta
metropolitan region, the most populated area in the world
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Asia
Metropolitan areas of Asia List of cities in AsiaList Bangkok Beijing Busan Chittagong Delhi Dhaka Doha Dubai Guangzhou Hanoi Ho Chi Minh Hong Kong Istanbul Jakarta Karachi Kuala Lumpur Manila Mumbai Osaka Pyongyang Riyadh Shanghai Shenzhen Singapore Seoul Taipei[4] Tehran Tokyo Ulaanbaatar Asia
Asia
(/ˈeɪʒə, ˈeɪʃə/ ( listen)) is Earth's largest and most populous continent, located primarily in the Eastern and Northern Hemispheres. It shares the continental landmass of Eurasia with the continent of Europe
Europe
and the continental landmass of Afro- Eurasia
Eurasia
with both Europe
Europe
and Africa
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Octahedron
In geometry, an octahedron (plural: octahedra) is a polyhedron with eight faces, twelve edges, and six vertices. The term is most commonly used to refer to the regular octahedron, a Platonic solid
Platonic solid
composed of eight equilateral triangles, four of which meet at each vertex. A regular octahedron is the dual polyhedron of a cube. It is a rectified tetrahedron. It is a square bipyramid in any of three orthogonal orientations
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Bern
The city of Bern
Bern
(German: [bɛrn] ( listen)) or Berne (French: [bɛʁn]; Italian: Berna [ˈbɛrna]; Romansh: Berna  [ˈbɛrnɐ]; Bernese German: Bärn [b̥æːrn]) is the de facto capital of Switzerland, referred to by the Swiss as their (e.g
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Australia
Coordinates: 25°S 133°E / 25°S 133°E / -25; 133Commonwealth of AustraliaFlagCoat of armsAnthem: "Advance Australia
Australia
Fair"[N 1]Capital Canberra 35°18′29″S 149°07′28″E / 35.30806°S 149.12444°E / -35.30806; 149.12444Largest city SydneyNational language English[N 2]DemonymAustralian Aussie
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Geelong
Geelong
Geelong
(/dʒɪˈlɒŋ/[3][4]) is a port city located on Corio Bay
Corio Bay
and the Barwon River, in the state of Victoria, Australia, 75 kilometres (47 mi) south-west of the state capital, Melbourne. It is the second largest Victorian city, with an estimated urban population of 192,393[1] as at June 2016, having grown 2.1 percent since June 2015.[1] Geelong
Geelong
runs from the plains of Lara in the north to the rolling hills of Waurn Ponds
Waurn Ponds
to the south, with Corio Bay
Corio Bay
to the east and hills to the west
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Heidelberg
Heidelberg
Heidelberg
(German pronunciation: [ˈhaɪdl̩bɛʁk] ( listen)) is a college town in Baden-Württemberg
Baden-Württemberg
situated on the river
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Harz
The Harz
Harz
is a Mittelgebirge
Mittelgebirge
that has the highest elevations in Northern Germany
Germany
and its rugged terrain extends across parts of Lower Saxony, Saxony-Anhalt, and Thuringia. The name Harz
Harz
derives from the Middle High German
Middle High German
word Hardt or Hart (hill forest), Latinized as Hercynia. The Brocken
Brocken
is the highest summit in the Harz
Harz
with an elevation of 1,141.1 metres (3,744 ft) above sea level
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Wernigerode
Wernigerode
Wernigerode
(German pronunciation: [ˌvɛɐ̯nɪɡəˈʁoːdə]) is a town in the district of Harz, Saxony-Anhalt, Germany. Until 2007, it was the capital of the district of Wernigerode.[2] Its population was 35,041 in 2012. Wernigerode
Wernigerode
is located southwest of Halberstadt, and is picturesquely situated on the Holtemme
Holtemme
river, on the north slopes of the Harz Mountains
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