Given: Eratosthenes was in about 274 BC. Sir Isaac Newton was born in 1642 AD.
Required: To determine the difference between both dates.
Explanation: The AD starts right after BC ends. There is no year zero. So we need to count from 247 BC to 1 BC and then 1 AD to 1642 AD.
Thus the difference between the birth dates of Eratosthenes and Sir Isaac Newton is-
[tex]\begin{gathered} =247+1642 \\ =1889\text{ years} \end{gathered}[/tex]
Final Answer: 1889 years.
