Multiple choice general knowledge math & puzzles By what means Babyloans Represented Zero By Letter O By - a small circle with a long overbar By word nulla Reveal answer Fill a bubble to check yourself C Correct answer Explanation Babylonians represented zero as a small circle with a long overbar, distinct from their other numerals. This cuneiform notation dates back to around 300 BCE. The letter O is unrelated, and nulla is Latin.