We count in tens because of the number of fingers we have in our hands. If we were aliens with six fingers then maybe we'd count in sixes (1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 20, etc.)
We count in tens because of the number of fingers we have in our hands. If we were aliens with six fingers then maybe we'd count in sixes (1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 20, etc.)
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