The technique which involves reading a text quickly in order to find specific information is called scanning. You'd use this approach when looking for information such as names, numbers, terms, etc. Reading quickly to understand the general meaning is called skimming.
When scanning, you should concentrate well, search for specific terms that are related to the information you are looking for, and pay attention to italicized words as writers often italicize and explain terms the first time they use them.
This person would have to be in 1990 B.C., because when in B.C., as the years go by, the number of the year gets lower. So the person was 10 in 1995 B.C., and 15 in 1900 B.C.
