Twentyfour Challenge is a game to sharpen your mental math skills.
Choose one of two pairs of numbers and then use *, /, , and - to produce the challenge number.
App keeps track of game score and saves high game scores.
Features:
o Appropriate for math students of all levels.
o Teaches operation order and precedence
o Multiple levels of difficulty with hints
o Best of all it's free with no advertising!
9Apps 4.9
