You’ll get:
- 780 if you answered 49 right, 0 wrong, and left 1 blank
- 740 if you answered 46 right, 0 wrong, and left 4 blank
- 700 if you answered 43 right, 4 wrong, and left 3 blank
- 650 if you answered 39 right, 8 wrong, and left 3 blank
- 600 if you answered 35 right, 8 wrong, and left 7 blank
So let's say the average score for SAT II Math IC for the school you want to attend is a 600, and you set your target at about 650. According to the chart, you can get 39 questions right, get 8 wrong, leave 3 questions blank, and still achieve your target score.
If you know all these numbers going into the test, you can pace yourself accordingly. You should use practice tests to teach yourself the proper pace, increasing your speed if you find that you aren't getting to answer all the questions you need to, or decreasing your pace if you find that you're rushing and making careless mistakes. If you reach your target score during preparation, give yourself a cookie and take a break for the day. But just because you hit your target score doesn't mean you should stop working altogether. In fact, you should view reaching your target score as a clue that you can do better than that score: set a new target 50-100 points above your original, and work to pick up your pace a little bit and skip fewer questions.
By improving your score in manageable increments, you can slowly work up to your top speed, integrating your new knowledge of the test and how to take it without overwhelming yourself. If you can handle working just a little faster without becoming careless and losing points, your score will certainly go up. If you meet your new target score again, repeat the process.