Jack's mental arithmetic Description
There are 4 modes to choose from: addition, subtraction, multiplication and division
One question, 3 answer options, you will fail if you choose the wrong answer or the timeout
One point for each question, see how many questions you can answer correctly
One question, 3 answer options, you will fail if you choose the wrong answer or the timeout
One point for each question, see how many questions you can answer correctly
Open up