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My favorite numbers (Posted on 2005-07-22) Difficulty: 3 of 5
Find 4 different positive integers A,B,C,D for which: A+B = C*D and A*B = C+D How many sets of 4 numbers can you find? Prove that only those sets exist.

No Solution Yet Submitted by Jurgen    
Rating: 3.5000 (6 votes)

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answer | Comment 8 of 13 |

A=1 B=.5 C=.5 D=1


  Posted by punchmancan on 2005-07-29 08:43:36
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