Have you ever been out for a stroll in your neighborhood and noticed that the house numbers are in the hundreds, like 526, 528, 530 instead of 1, 2, 3? Why is that? We asked urban planner Brittany Simmons to help us find the answer.

Do you have a question that’s number 1 on your mind? Send it to us at BrainsOn.org/contact, and we’ll help address the answer.