Are You Clever - 4X4 Color Blind Puzzle. Publisher: GuoDong Ren Genre: Medical Released: 17 Mar, 2016 Size: 22.0 MB Price: FREE! Click here to request a review of this app App Store Info Description This game is also named KenDoku、CalcuDoku、Square Wisdom,here is the rule:1、 Each row and column contains different digit 2、 Each group of cells is a cage containing digits which achieve the specified result using one of them(+,-,×,/). Screenshots Screenshot 1 of 6