2005 PMWC Problems/Problem T5

Problem

Mr. Wong has a $7$-digit phone number $\text{ABCDEFG}$. The sum of the number formed by the first $4$ digits $\text{ABCD}$ and the number formed by the last $3$ digits $\text{EFG}$ is $9063$. The sum of the number formed by the first $3$ digits $\text{ABC}$ and the number formed by the last $4$ digits $\text{DEFG}$ is $2529$. What is Mr. Wong’s phone number?


Solution

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