How Old is the Rose-Red City?

 

after Martin Gardner

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"A rose-red city half as old as Time.
One billion years ago the city's age
Was just two-fifths of what Time's age will be
A billion years from now. Can you compute
How old the crimson city is today?"

Based on these five lines can you figure out how old is the Rose-Red city?

 
Last Updated: May 24, 2008
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