A tradução do texto foi feita pelo Google Translate. Fonte: An Example of a Difficult Level - 3-digit Magic Table
O quadrado mágico mostrado acima mostra as chaves de todos os três grupos nas subseções. Entre as subseções, mostra as três chaves principais.
Each column consists of three vertical rows of digits with three digits in each row. We consider each of these three digits as a three-digit number. The table below shows the digital roots of these numbers:
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