Patent ID: 6619661
Filing Date: 2003-09-16
Classification: A63F,G09B

Abstract:
A circular, essentially two-dimensional jigsaw puzzle for practicing arithmetic, said jigsaw puzzle being formed of a plurality of interfitting pieces, said jigsaw puzzle and each of said pieces having first and second planar surfaces, said plurality of interfitting pieces including:a circular center piece containing a plurality of substantially evenly spaced apart operand numbers located on said first planar surface adjacent its periphery; a plurality of irregularly shaped middle ring question pieces encircling said circular center piece, said middle ring question pieces adapted to interfit with said circular center piece and with each other in only a single configuration, each of said middle ring question pieces having at least one arithmetic question located on said first planar surface thereof, said arithmetic question being in the form of an arithmetic operator sign followed by an operator number and an equal sign, each of said arithmetic questions being in radial alignment with an associated one of said operand numbers located on said circular center piece; a plurality of identically shaped outer ring answer pieces encircling said middle ring question pieces, each of said outer ring answer pieces having a single answer number located on said first planar surface thereof, each of said outer ring answer pieces adapted to interfit with each other and with each and every one of said middle ring question pieces with said answer number located on said answer piece being in radial alignment with one of said arithmetic questions and its associated radially aligned operand number; and a picture located on said second planar surface of said jigsaw puzzle.