NUMBERU is a game to test your brain power in arithmetic calculation. Your goal is to use all 4 randomly selected digits with the provided arithmetic operators to form an expression equals to 24. There are two modes in NUMBERU: SHOOTER mode: you solve one set of digits in each game and the first five shortest times are recorded. CHASER mode: you score 10 points for each correct expression until the timer drops to 0. The timer starts from 100 seconds and bonus time will be added for each correct expression.