Q1: How do I submit my answer?
A: Click on the arrow sign when you are ready.
Q2: Why my points decrease after I submit an answer?
A: If you submit a wrong answer, you lose 100 points.
Q3: Why I cannot drag and drop an operator?
A: Maximum three operators are allowed. Remove one first and add another one.
Q4: Why I cannot drag and drop the fourth operator?
A: Because you don't need it. Only three operators needed for four cards.
Q5: Why I can only use two sets of brackets?
A: Because you don't need more.
Q6: Why I cannot see answers?
A: Free version only provide you answers up to Level B-3.
Q7: Why Level G-1 is still locked when I pass the passing score for Level S-3?
A: Free version only have Levels up to S-3. Please download the full version.