If his grandfather turned G years old on his birthday, then in G more years Paul's grandfather will be twice as old:



Now: 

Paul is 0

Grandfather is G



G years into future:

Paul will be G 

Grandfather will be G+G = 2G  (= twice Paul's age)





 

Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
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