<p>Yes, every little, seemingly insignificant question can have the potential to shake your score, especially in Math and Writing. Take this from someone who lost 40 points because of one stupid math question. I also have a friend whose Writing score would have gone up 50 points had he answered one more multiple-choice question correctly.</p>
<p>By the way, every essay point on the Writing section matters a lot, too. One extra point on the essay would have boosted my Writing score by 30 points, and another would have added another 20.</p>