Posted by **illeana** on Saturday, May 19, 2012 at 4:35am.

1 if x+1/x=2 then x^2012+1/x^2012=........

2 if A > B > C > D, find the digits A,B,C,D which are from 1 to 9 so that ABCD-DCBA=BDAC

3 solve x+y=28 xy=127

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