How many computer-generated arithmetic problems can you answer in 60 seconds?

Goal: 1 - 12 for any operation, 30 in 60 seconds. Random: 20 in 60 seconds (a second is lost on each wrong answer)

Choose low number: 0 1 2 3 4 5 6 7 8 9 10 11 12 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12

4. Enter the answer and click "Check Answer":