Students verbal scores on the SAT correlate very strongly with their subsequent verbal scores on the GRE. Students math scores on the SAT correlate very strongly with their subsequent math scores on the GRE
While the SAT scores for the subjects may not be able to directly show the final marks, a person may score in the GRE Examinations, they do have quite a strong correlation in case of maths and verbal sections of studies.
This is so because in both the examinations, the SAT is a good enough gauge to help see the level a person is at the moment in terms of their ability for that particular subject. For maths and verbal scores, the SAT correlates quite strongly with the GRE, thus making this the answer.
