ISBN: 1474814735ISBN13: 9781474814737Totally Brain-Busting Number Puzzlesby Parragon Publishing and Parragon BooksSee ReviewsISBN: 1474814735ISBN13: 9781474814737FormatsPaperbackOut of stockConditionsLike NewUnavailableVery GoodUnavailableGoodUnavailableAcceptableUnavailableNewUnavailableFormatsPaperback (Out of stock)ConditionsUnavailableSee all 2 editions