SAT Math Question... typo?

Test Preparation SAT Preparation
1

<p>5) A triangle has a perimeter of 13 and one side of length 3. If the lengths of the other two sides are equal, what is the length of each of them?</p>

<p>a. 4
b. 5
c. 6
d. 7
e. 8</p>

<p>I thought this was easy, 13 - 3 = 10 total length, divide by 2, B. 5 for each of the other two lengths. The answers in the back say e. 8 for some reason, and I can't figure out why. I'm certain it's a typo though.
Can someone help me? Is it a typo or something or am I just delusional and missing something basic?</p>

2

<p>Probably a typo.</p>

3

<p>They probably did 13+3 = 16, 16/2 = 8 for each by accident. Which book is this from? This is why I usually don’t trust non-BB/Princeton Review books. And the PR books are wrong sometimes too.</p>

4

<p>LOL. Never mind, it was a misreading. Looked it more closely, and discovered like a stain. Turns out that my weird ‘E’ choice is really a partially covered up ‘B’.</p>