Multiple choice math games. Personally, I'm very very didn't well meth. interlude of using mind-Try feeling the pressure. I feel more math skills is growing up rapidly. 1. There are three levels. Step 1 1 ~ 10 Step 2 1 ~ 100 Step 3 1 ~ 1000 2. You can set marks. +, -, * The division is not. I went out point; 3. Hidden Mode The problem is it hides showed 0.5 seconds. (3 level shows in 1.5 seconds) 4. Time Setting For the busy modern man. The time setting is 10 seconds. 5. Result Suggested in the previous section shows a list of problems. I've put on a 'little effects.