The Literature edition (Arts & Letters outside of Japan) features word and memory puzzles. One new puzzle is called Photo Memory, a memory puzzle, where the game will take a picture from either the game itself or from the player's DSi, show it to the player, and then have the player pick between it and other randomly selected images from the player's folder while showing another image to memorize, and so on. For Brain Age Check, it uses Stroop Test, Connect Maze, Rock, Paper, Scissors, Word Memory, and Symbol Match. The Training mode features Reading Aloud, Piano Player, and others.
Source: Wikipedia, "Brain Age Express", available under the CC-BY-SA License.