So I perfer odd numbers. Is it the math teacher coming out in me. I get so excited working problems that are difficult and actually require thinking. Today most people rely on calculators to do math, but what has happened to the days of paper, pencil, and your brain. Yes, your brain. The part of the brain that develops last is the part one needs to do math. So, have we become lazy now to rely on calculators. Work your brain more and your memory skills will also improve. Odd numbers aren't perfect-so one must concentrate more and learn to think outside of the box.