How do you beat your high score on level one on mathletics

say for example your high score is 70 then the next time you play there will be a red bar on 70m if you get past that line your record will be broken and you will get 10 credits, also if it is your first go on the level get your high score to one then strike out. you'll get 10 credits then do the same but get 2 questions right and by the time you've done this 10 times you'll have 100 credits. please comment :)