Final answer:Theagesgiven in the question can only be possible if we're speaking about the years in BC, not AD.So in 1990 BC the person is 15 years old, and in 1995 BC the same person is 10 years old.Explanation:The problem presented here is more of a brain teaser than a mathematical problem. The likelysolutionto the 'age riddle' is that we're speaking of years BC, not AD. So, if we start from the year 1990 BC, when this person was born, we can countforwardto 1995 BC, when they would have been 10 years old, because we are counting downwards in years, from 1990 to 1995.The ages mentioned in the question make sense if they refer to years in BC (Before Christ) rather than AD (Anno Domini). In 1990 BC, the person is 15 years old, and in 1995 BC, thesamepersonis 10 years old.Learn more about BC and AD years:brainly.com/question/39388658#SPJ11...

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