The numerical value of One Thousand is represented by the Roman numeral "M" in the international standard for historical numbers. In the modern Western numerical systems, the Roman numeral for one thousand is "M", which is derived from the Greek letter "mu" (mu), which represents the value of ten thousand in ancient Greek numerals. In English, the word "thousand" (pronounced "thuh-roo") is used to describe amounts of ten hundred (10 x 100), ten thousand (10 x 1,000), and ten millions (10 x 10,000). The name of this number is derived from the Old English word "wifan," which means "five tens," and the Old English word "tytan," which means "twenty," combined to form the meaning of five tens multiplied by twenty, or twenty thousand. The concept of the numerical value of ten thousand has been fundamental in the development of mathematics, particularly in the creation of numerical systems and the understanding of the structure of numbers.
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