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July 24th, 2012, 09:24 AM   #1
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[attachment=0:zwzp9khz]2001.jpg[/attachment:zwzp9khz]

Ans:2001
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 July 24th, 2012, 09:32 AM #2 Global Moderator   Joined: Dec 2006 Posts: 20,370 Thanks: 2007 199919991999/100010001 + (2/1) = 1999 + 2 = 2001
 July 24th, 2012, 10:02 AM #3 Senior Member   Joined: Apr 2012 Posts: 799 Thanks: 1 Re: try your calculation skipjack :very good
 July 24th, 2012, 02:31 PM #4 Global Moderator     Joined: Oct 2008 From: London, Ontario, Canada - The Forest City Posts: 7,923 Thanks: 1122 Math Focus: Elementary mathematics and beyond Re: try your calculation 2000 × 1999 - 2001 × 1998 = 2000 × 1999 - (2000 × 1998 + 199 = 2000 × 1999 - 2000 × 1998 - 1998 = 2000(1999 - 199 - 1998 = 2.
 July 24th, 2012, 04:38 PM #5 Global Moderator   Joined: Dec 2006 Posts: 20,370 Thanks: 2007 For any value of n (including 199, (n + 2)(n + 1) - (n + 3)n = 2.
July 24th, 2012, 05:37 PM   #6
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[attachment=0:iantrghf]2001~.JPG[/attachment:iantrghf]
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