Challenge: Write Down All 4-Digit Palindromic Numbers Divisible By 42

Palindromic Numbers Read The Same When Reversed

Photo by Arisa Chattasa on Unsplash

A palindromic number is one which reads the same when reversed e.g. 11, 12321 , 12455421.

In this piece we restrict our attention to 4-digit palindromic numbers and ask which of these are divisible by 42?