Multiple choice general knowledge sports World's oldest piece of chewing gum is how many years old?? 9000 2000 5000 7000 Reveal answer Fill a bubble to check yourself A Correct answer Explanation A piece of birch bark pitch (used as chewing gum) discovered in Scandinavia and dating back approximately 9,000 years is considered the world's oldest chewing gum. It was found in Sweden and shows tooth marks from Stone Age adolescents.