6 books Sudoku book Jiugongge crossword concentration mathematical logic thinking intelligence training exercises book

6 books Sudoku book Jiugongge crossword concentration mathematical logic thinking intelligence training exercises book

Sudoku book Jiugongge crossword concentration mathematical logic thinking intelligence training exercises book with 700 question

Paperback: About 148 pages / bookSize:10.5*14.2cmLanguage: Simplified ChineseSet of 6 books********


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