The numbers we use today originated from Arabic numerals, which were derived from earlier numeral systems used by Phoenician merchants. While the Arabs popularized these numerals, their foundations can be traced back even earlier. Remarkably, the structure of the Arabic numerals is based on the number of angles each symbol contains - for example, one angle for 1, two angles for 2, and so on, with zero symbolizing no angles. This reveals the simple but ingenious logic behind the Arabic numeral system.