Diana had 80 IQ questions to solve in a competition.
For every correct answer, Diana would earn 35 points.
For every incorrect answer, Diana would get 40 points deducted.
After answering all the questions, Diana scored a total of 2,125 points.
How many incorrect answers did Diana get?

Answer: A. 9 incorrect answers

If all 80 questions were correct, the score would be 80 * 35 = 2800.
The difference between 2800 and her actual score (2125) is 675.
Every time she gets an answer wrong, she loses 35 points (the gain) PLUS 40 points (the deduction), which is 75 points.
Total incorrect answers = 675 / 75 = 9.

Answering after opening this box earns no Practice Points.