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Întrebarea care a fost postată pe Facebook de către familia Holderness din Carolina de Nord implică substituirea numerelor cu cifre. În timp ce provocarea trebuia să îi facă pe copii să gândească în moduri diferite, problema i-a pus în dificultate pe mulţi adulţi, notează Daily Mail.
,,Prieteni de pe internet, rezolvaţi această problemă de matematică a unui copil din clasa întâi,” afirmă familia Holderness pe pagina lor de Facebook.
În imagine sunt prezente litere aranjate după un anumit model:
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