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ZAP 2010, Exercise 6 — Palindromes with digit sum 9

Patterns and sequencesZAP 2010Medium

Your answer

Enter all the numbers, separated by semicolons. The order does not matter.

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Harder

ZAP 2014, Exercise 7 — Five-digit numbers from {2,3,4,5,6,7,8,9}Combinatorics 032 — ZAP 2020, Exercise 5: Four-digit numbers with conditions Combinatorics 035 — ZAP 2018, Exercise 8