I’m writing to let you know that there was an invalid Quantitative question on your recent GMAT exam and that we are adjusting your score. We apologize for our mistake and for any inconvenience it may cause.
Here’s what happened: We recently received a challenge to a Quantitative question on the GMAT exam. When we investigated, we found the test taker who challenged the question was correct. We invalidated the question and rescored all the exams on which the question appeared. Because the question was on your test, we rescored your exam, resulting in a higher score.