Friday, 16 September 2011

Number of the week

541  
What does this number represent?  
 
Congratulations Tom Bailey for last week.
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2 comments:

  1. Tom Weir19 September 2011 at 14:40

    Just got it. Height of the Freedom Tower/ New World Trade Centre in meters

    ReplyDelete
  2. Tom Weir19 September 2011 at 15:00

    also the 100th prime

    ReplyDelete

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