Originally Posted by DAD22
If we look at the distributions for the top math scores from Val's link, we see that 770 and 740 are more popular scores than 760 and 730 respectively. This is most likely an indication that answering 1 multiple choice questions wrong results in a score of 770.

No, it's because different versions of the test have different scaled score results for the same raw score. http://media.collegeboard.com/digitalServices/pdf/SAT-RAW_Score_Scaled-Score_Ranges_2011.pdf

(You lose 1/4 of a point for each wrong answer on the multiple choice, but your score is rounded up in calculating the raw score. So getting 3 wrong produces the same raw score as leaving 3 blank, but getting 4 wrong produces the same raw score as leaving 5 blank.)