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<p>[QUOTE=&quot;ErolGarip, post: 2821310, member: 88736&quot;]Thanks, but, I don&#039;t prefer my posts here to scatter around the forum and my main interest here is not about the history, it is about the coin&amp;math and economy as well and I guess this fits &quot;coinchat&quot; and it is better to keep the talk restricted to this thread. </p><p><br /></p><p>Yes, my OP was about numerals/face values also in ancient coins, but, a part of aim was to see also all coins existed in a certain old day in time and in a certain region of old day. Roman period of 100-200BC fits this purpose, which is not to study history of Romans here. I may visit there ancientcoins room later.</p><p><br /></p><p>Anyway, I guess, it is correct enough to take this scheme which relates different coins, mathematically link to each others: </p><p><br /></p><p>1aureus = 25denarii = 50quinarii =100sestertii = 200dupondii = 400as = 800semisses = 1600quadrans ... </p><p>during 190-180BC of Romans. </p><p><br /></p><p>Its a similar version today is: (beside 100usd, 20usd, 5usd, 1usd notes) </p><p>1usd = 2half = 4quarter = 10dimes = 20nickels = 100cents ... </p><p><br /></p><p>From mathematical point of view, I already mentioned which the most important one is, i.e., 1quadran, 1cent, etc. </p><p><br /></p><p>Now, from economy point of view, before writing coin&amp;economy formula, the most important coin is to be determined. </p><p>For this, to take a general picture of economy in a place, lets say, the most important coin is the most circulated one.</p><p>In Roman days, what you said was &quot;sestertius&quot; or &quot;As&quot;?. Today in USA, I guess it is &quot;quarter&quot; or maybe, &quot;dime&quot;.[/QUOTE]</p><p><br /></p>

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