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Gerasans t1_j0mm88f wrote

Why most of world currency is 1, 2, 5, 10, 20, 50, 100 (x10, x100)? Does every country comes to this by its own way, or was it just copying one country? (Ancient or medieval)?

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Nostezuma t1_j0mw3bi wrote

I think this is just the most useful and easy way to count and bring/pay various amounts from small things like groceries to big stuff. Just easy to count. But it is actually an inyeresting question.

Medieval cureency was mad, heck, even quete recently UK had remnanet of that in form of guiness etc

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Helmut1642 t1_j1hflhd wrote

Medieval currency was based on the value of the metal and as inflation, metal supply and the purity of the metal, so new coins was minted. Then they also made coins to fit common transactions.

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Kobbett t1_j0n704w wrote

Decimal currencies make things much easier for accounting reasons - so much simpler to total the columns. Earlier currencies might vary the coin values depending on the value of the different metals used.
Until 1971 Britain's coinage (in pennies) would have been 1,3,6,12,24,30,60,240 and 252 for the Guinea, which was no longer a minted coin by then, but was - and still is - used for certain transactions.

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