How many math majors are in Professor X’s physics class? (1) If Professor X admits 10 more students into the class, and if all the newly admitted students are math majors, then the ratio of non-math majors to math majors would be 5 to 4. (2) Currently, there are 25 non-math majors in Professor X’s class.

Data Sufficiency questions are exclusive to the GMAT.

Each Data Sufficiency question poses a question, followed by two statements. Your task is to evaluate the statements to determine at what point there is or is not sufficient information to answer the question.

Unlike the Problem Solving questions, you do not actually have to answer the question posed. Instead, you select one of five fixed answer choices that offer different options about the sufficiency of the information provided in the two statements.