The Mayan and other Mesoamerican cultures used a vigesimal number system based on base 20 (and, to some extent, base 5), probably originally developed from counting on fingers and toes. The numerals consisted of only three symbols: zero, represented as a shell shape; one, a dot; and five, a bar.
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i doing the test right now?
I'm assuming you mean topographic maps, in that case C. Elevation
It allows people from multiple countries to connect at once while playing an online game.
