What is the oldest number?

Answer 1

The concept of the "oldest number" can be interpreted in various ways, but in terms of numerical notation, the oldest known recorded number is believed to be from around 35,000 years ago, found in the form of tally marks on a bone in Africa. In mathematical terms, the number 1 is often considered the oldest as it represents the fundamental concept of counting. However, numbers themselves are abstract concepts, so assigning an "age" to a number is more philosophical than factual.