Solve puzzles by selecting correct operations. Choose from addition, subtraction, multiplication, or division. Tap to answer quickly. Track time and improve speed. Progress through challenging levels.
The app offers practice with subtraction problems ranging from one to six digits. Users can choose random problems or enter their own, with tutorial animations and hint options available.
Provides country codes with 2-letter (alpha-2), 3-letter (alpha-3), and 3-digit numeric formats. Allows sorting by country name, alpha-2, alpha-3, or numeric. Optionally displays country names in French.