SOLUTION: "Karl, who is 18 years old, has a great-grandfather, aged 78 years. How many years ago was Karl's great-grandfather 7times as old as Karl?"
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Question 232749: "Karl, who is 18 years old, has a great-grandfather, aged 78 years. How many years ago was Karl's great-grandfather 7times as old as Karl?"
Thank you Answer by edjones(8007) (Show Source):
