Question 1058200

This one surprised me a little bit.  I thought I'd need a lot of information given but as I wrote the facts down, it became apparent that the only two pieces of information needed are the sum and differences:

Call the three digit number x
and the reversed number y

 {{{ x+y = 665  }}}    (1)
 {{{  x-y = 297  }}}    (2)

Add (1) to (2) to get:

 {{{ 2x = 962 }}}
{{{ x = 481 }}}
{{{ y = x - 297 = 184 }}}
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Ans:   x=481
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Check:
    We were told the 10's digit is twice the one-hundreds digit.  8 = 4*2 (ok)
Also:   
            481 - 184 = 297   
            481 + 184 = 665