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- Think-a-Dot abstract "The Think-a-Dot was a mathematical toy made by E.S.R., Inc. during the 1960s that demonstrated group theory. It had eight coloured disks on its front, and three holes on its top - left, right, and center - through which a ball bearing could be dropped. Each disk would display either a yellow or blue face, depending on whether the mechanism behind it was tipped to the right or the left. The Think-a-Dot thus had 28=256 internal states. When the ball fell to the bottom it would exit either to a hole on the left or the right of the device.As the ball passed through the Think-a-Dot, it would flip the disk mechanisms that it passed, and they in turn would determine whether the ball would be deflected to the left or to the right. Various puzzles and games were possible with the Think-a-Dot, such as flipping the colours of all cells in the minimum number of moves, or reaching a given state from a monochrome state or vice-versa.".
- Think-a-Dot wikiPageExternalLink pic06-ad.html.
- Think-a-Dot wikiPageExternalLink pic10-leaflet.html.
- Think-a-Dot wikiPageID "918013".
- Think-a-Dot wikiPageRevisionID "575797441".
- Think-a-Dot hasPhotoCollection Think-a-Dot.
- Think-a-Dot subject Category:Mechanical_puzzles.
- Think-a-Dot type Abstraction100002137.
- Think-a-Dot type Communication100033020.
- Think-a-Dot type MechanicalPuzzles.
- Think-a-Dot type Message106598915.
- Think-a-Dot type Problem106784003.
- Think-a-Dot type Puzzle106784639.
- Think-a-Dot type Question106783768.
- Think-a-Dot type Subject106599788.
- Think-a-Dot comment "The Think-a-Dot was a mathematical toy made by E.S.R., Inc. during the 1960s that demonstrated group theory. It had eight coloured disks on its front, and three holes on its top - left, right, and center - through which a ball bearing could be dropped. Each disk would display either a yellow or blue face, depending on whether the mechanism behind it was tipped to the right or the left. The Think-a-Dot thus had 28=256 internal states.".
- Think-a-Dot label "Think-a-Dot".
- Think-a-Dot sameAs m.03psx1.
- Think-a-Dot sameAs Q7784433.
- Think-a-Dot sameAs Q7784433.
- Think-a-Dot sameAs Think-a-Dot.
- Think-a-Dot wasDerivedFrom Think-a-Dot?oldid=575797441.
- Think-a-Dot isPrimaryTopicOf Think-a-Dot.