700 Mannin no Atama o Yokusuru: Chou Keisan DS: 13000 Mon + Image Keisan

700 Mannin no Atama o Yokusuru: Chou Keisan DS: 13000 Mon + Image Keisan focuses on enhancing arithmetic skills through a series of math problems, with over 13,000 questions designed to challenge players. In addition to traditional calculation exercises, the game includes visual puzzles where players solve problems based on images.

The game is part of a series aimed at improving cognitive abilities, with this installment specifically targeting a large number of users ("700 Mannin" translates to "7 million people") by offering a wide range of mathematical challenges.