Three-digit numbers
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.
© 1997-2004, Millennium Mathematics Project, University
of Cambridge.
Permission is granted to print and copy this page on paper for non-commercial use. For other uses, including electronic redistribution, please contact us.
Permission is granted to print and copy this page on paper for non-commercial use. For other uses, including electronic redistribution, please contact us.
Issue 5
May 1998
Features
Career interview
Regulars
Staffroom
Subscribe to our RSS feed:
