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Divisible Palindrome

Age 14 to 16 Short
Challenge Level

Palindromic numbers read the same backwards and forwards, e.g. 7227 or 10101.

What is the sum of the digits of the largest 4-digit palindromic number which is divisible by 15? 


If you liked this problem, here is an NRICH task that challenges you to use similar mathematical ideas.


This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.
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