Who was the first to use an abacus?
B) Leonardo da Vinci
D) Isaac Newton
Archimedes, the ancient Greek mathematician and inventor, is often credited with being one of the early users of the abacus. The abacus itself has a long history and was used by various ancient civilizations for mathematical calculations. While Archimedes is associated with its early use, other cultures, including the Chinese and Romans, also developed and used similar counting devices.