Are we born Intelligent? No. We don't come out citing the Pythagorean Theorem or reading Shakespeare in the nursery in our down time.
You need to acquire it, but that like everything else comes to each of us at different paces.
I cannot do math to save my life, nor have I ever been able to. Aside from the Add, subtract, multiply, and divide I am totally useless.
But as a 4th grader I was reading at Collegiate Freshman level.
I have a friend on the other hand, who is in College level Calculus (The highest math program at my High School) and is a grade below me. He on the other hand cannot quite read well. He reads, just not as good as some of our peers.
Intelligence comes to some easier than others, and it may come in one field more than others. But what truly defines intelligence? Being smart in ALL fields of learning, or being smarter in one over the other?
Sounds like you're about to have an awesome debate.