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my maths teacher was talking about a coin system that uses 1p 3p 17p plus some more I cannot remember. Is this a legitimate idea that someone has thought about before or is my teacher just making things up?
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Russia and the USSR used 3-kopek coins for better efficiency.
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How about denominations of 1, 2, 4, 8, 16, 32, 64, etc? You'd never need duplicate coins for a single transaction.
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I think there should be a 7p coin as well. Sine 1,1,3,7,17 is a modified version of the Fibonacci sequence, where \[;a\_n = 2a\_{n-1} + a\_{n-2};\]. Just a guess.
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It's 1, 3, 9, 27......
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What we really need is negative coins to make paying for 99c things easier.
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Harry potter? They used something like this if I remember correctly…
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I might be talking garbage but wouldn’t a Fibonacci sequence be the way to go ?  Or does it have too many small ‘denominations’ ?
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