Posted by **sagar** on Friday, June 8, 2012 at 3:41am.

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 from1 to 9), so that

ABCD-DCBA=BDAC.

3)solve:px-qy=r and rx-py=q.

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