<p>I actually got the question wrong on the first try, due to the silly mistake of trying to answer too quickly. And I got an 800 on the SAT Math section and an 800 on the SAT Math Subject Test! I imagined the triangle with hypotenuse 25 and vertical 20, realized that they both were divisible by 5, and got hypotenuse 5 and vertical length 4. Then the horizontal must be 3, the difference between 7 and 3 is 4, and so I picked 4 and got the wrong answer. Of course, it was wrong because I forgot to multiply the 3 by 5 to get 15, and 15-7 = 8. </p>
<p>somekidinnyc: Calculators don’t really help in this problem.</p>
<p>Lesson: Read the question carefully and in the same manner solve the problem. It’s not a race. The fact that Ankur solved the problem in fewer than ten seconds doesn’t mean anything.</p>