## Three-digit numbers

Submitted by plusadmin on May 1, 1998May 1998

A three-digit number is such that its second digit is the sum of its first and third digits.

**Prove** that the number must be divisible by 11.

- Three-digit numbers
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May 1998

A three-digit number is such that its second digit is the sum of its first and third digits.

**Prove** that the number must be divisible by 11.