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六角形を一つずつ解いて、力をつけよう。
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First volume: full price. Second: −30%. Third and following: −50%.
One-time purchase
68 puzzles with solutions in a downloadable PDF collection. Edition: 日本語.
印刷して楽しめる六角形の計算パズル68問、解答付き。ダウンロード用PDFです。紙の本の発送はありません。
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