Unless you're using binary -- and even if you are -- the answer has to be 1.
A brain teaser, What is the answer to this problem? 1 + 1 + 1 + 1 + 1 1 + 1 + 1 + 1 + 1 1 + 1 × 0 + 1 =?
Sure about that answer?
eduplace.com/math/mathsteps/4/a/index.html