Correct answer displaying device for arithmetic practicing unit

摘要: A correct answer displaying device for an arithmetic practicing or the like. Plural chambers are arranged in matrix form with partition boards, and a colored transparent plate is placed over on which numerical problems to be solved indicated through configurations of numbers cannot ordinarily observed. Answer levers operated cause white plates come near lower surface display answers. The pivotally mounted about one side thereof engaging step formed. Each lever, has protrusion engaged respective step, accommodated guide frame such manner that lever can pass out corresponding chamber.