Difference between revisions of "2005 PMWC Problems/Problem T5"
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Latest revision as of 02:48, 6 October 2014
Problem
Mr. Wong has a -digit phone number . The sum of the number formed by the first digits and the number formed by the last digits is . The sum of the number formed by the first digits and the number formed by the last digits is . What is Mr. Wong’s phone number?