| 摘要 |
A puzzle comprises a number of elements, preferably between four and twelve, which are capable of being placed in a stack in any order, each member having several segments in locations which overlie the segments of the other element or elements when the elements are in a stack, some of the segments being open and some being closed, and the closed segments having colours or parts of pictures or designs, whereby when the elements are stacked in a proper order only a single pattern or design is visible from one end of the stack.
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