Challenge your mathematical skills with Tashiten: Tashite 10 ni Suru Monogatari, a unique Japanese import puzzle game for the Nintendo DS. The title translates to "Adding Ten: The Story of Making Ten," and the gameplay revolves around quickly identifying and selecting numbers that add up to ten from a grid. This engaging brain-teaser tests your mental arithmetic and speed. With its simple yet addictive mechanics and focus on numerical problem-solving, Tashiten offers a fun and educational experience, presented in Japanese, perfect for quick bursts of brain training on the go.