Answer:

1. 5,000 years ago

- The idea of number and the process of counting goes back far beyond history began to be recorded. There is some archeological evidence that suggests that humans are counting as far back as 5,000 years ago. However , we do not really know how this process started or developed over time.

2. We use numbers in time , date , year and weather. We use numbers in school and work , counting money , measurements , phone numbers , passwords on our phone , locks , reading , page numbers And TV channels. Engineers use numbers for their calculations to construct building and roads. Doctor use it for blood counts and medicines.