Challenge Me - Math Workout (USA) (Japanese title: チャレンジ・ミー数学のトレーニング) is an educational puzzle game developed by Nintendo for the Nintendo DS. The game is designed to help players improve their math skills by providing a variety of fun and challenging puzzles. Players can choose from a range of difficulty levels, from beginner to expert, to suit their skill level. The game features over 300 puzzles, including addition, subtraction, multiplication, division, and even algebra. The game also includes a practice mode, where players can practice their math skills without the pressure of time limits or a score. Players can also compete against each other in a two-player mode, where they can race against each other to see who can solve the puzzles the fastest. Challenge Me - Math Workout is an engaging and enjoyable way to help players improve their math skills and have fun at the same time.