Born in the 1800's???

Funny story from work today, my first day back after Christmas vacation. Today was a student's birthday, we all happily sang happy birthday to him, then I proceeded to ask him how old he is now. He quickly replied with "eight." Then another student, a smart, funny boy, said "How old are you, Mrs. Anderson?" I replied, "Old. Really old." He piped back, "Were you born in the 1900's or the 1800's?" I couldn't help but have a good chuckle right then and there. Some days I feel old, but not THAT old!!