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Four-Digit Number (Posted on 2003-04-26) Difficulty: 4 of 5
Find a four-digit number with four different digits, that is equal to the number formed by its digits in descending order minus the number formed by its digits in ascending order.

See The Solution Submitted by Ravi Raja    
Rating: 3.1667 (6 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: Proof :) | Comment 5 of 15 |
(In reply to Proof :) by Gamer)

Gamer, I want to understand your proof. You make a mention of x and y without defining them. Did I miss an earlier partial proof?
  Posted by Bryan on 2003-04-26 17:29:12

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