Grid-in questions, or student-produced responses, account for about 22% of the 58 questions on the SAT math section. As opposed to multiple-choice questions, where the right answer is always one of ...
Bayardo Jr., R. J.; Schrag, R. C. Using CSP look-back techniques to solve real world SAT instances. In: Proc. of the 14th National Conf. on Artificial Intelligence ...