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<p>[QUOTE=&quot;ErolGarip, post: 2810821, member: 88736&quot;]When I searched the net using keyword &quot;coin mathematics&quot; I found these: </p><p><br /></p><p>1. Probability &amp; statistics (in coin toss, flip flow, 1/2 probability for &quot;head&quot; and 1/2 probability in &quot;tail&quot;. This &quot;head &amp; tail&quot; is another topic, actually about &quot;art/literature/etc&quot; and &quot;numbers/math&quot;, anyway, I may write some more later about that.) </p><p><br /></p><p>2. Fair coin &amp; unfair coin (again in the probability field, with geometrical &quot;smoothness&quot;) </p><p><br /></p><p>3. Educational mathematics (counting numbers in elementary schools, and high school level math like this <a href="http://www.purplemath.com/modules/coinprob.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.purplemath.com/modules/coinprob.htm" rel="nofollow">http://www.purplemath.com/modules/coinprob.htm</a> ) </p><p><br /></p><p>4. And, the one that &quot;Chrisild&quot; mentioned in this thread (above), &quot;Before the euro was introduced around here, there was some discussion about what could be the best &quot;setup&quot; for the new currency. What is easy to understand, but also questions such as, how many coins or notes are needed to pay any amount between x and y?...&quot; </p><p><br /></p><p>--- </p><p><br /></p><p>So, these are all, available on the net, that are related to &quot;coin mathematics&quot; which I can translate it as &quot;coin is money is mathematics.&quot; Among those above, 1 and 2 are not really about the coin. 3 is basic basis of coin math. 4 is closer to understanding &quot;coin mathematics.&quot; Question &quot;how many coins/notes are needed to pay any amount between x and y?&quot; is not a simple question. When such a question is tried to be answered, many subfields of mathematics enter into the game (from number theory to simple calculus to advanced analytics to statistics to probability to optimization, etc.) And, when a coin is omitted/ignored, all these calculations fail... So, a coin is a necessity... </p><p><br /></p><p>Ps: ok, this thread has become like a monologue thread, because, perhaps, what is meant here is not understood, yet. Maybe, someones else can participate later.[/QUOTE]</p><p><br /></p>

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