Archimedes Laboratory Project™
Puzzles & Mental Activities that Enhance Critical and Creative Thinking Skills

Mary has exactly 20 seconds to write down 5 different 6-digit numbers, each of which must be divisible by 7, 11, and 13 respectively. Is this challenge possible? Can you help Mary?
Marie a exactement 20 secondes pour écrire 5 nombres différents à 6 chiffres, chacun devant être divisible respectivement par 7, 11 et 13. Ce défi est-il possible? Pouvez-vous aider Marie?
Maria ha esattamente 20 secondi per annotare 5 diversi numeri a 6 cifre, ognuno dei quali deve essere divisibile per 7, 11, e 13, rispettivamente. La sfida è possibile? Potete aiutare Maria?

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Solution: Any 6-digit number of the form ABCABC will do fine (like 123123 or 275275), since abcabc / abc equals 1001 which equals 7x11x13. Please spread the word about the Sunday Puzzle!