![]() ![]() One thing about these free washrooms is that they're hard to find, they're often dirty, and a lot of them have restrictive opening hours. On the other hand, the US already mainly uses bills for $1, which is why $2 makes no sense in the US.) $10 in $2 coins will weigh significantly less than in $1 coins in your pocket. (Edit: maybe the case is different for heavy coins though? E.g. * Finding a practical balance between carrying a minimal number of bills for any given total value (where powers of 2 would win), versus minimizing infrastructure like sizes of cash registers (where powers of 10 would save space in layout). There's no functional reason and no aesthetic reason either. There's already no particularly good functional reason for dimes or $10 bills, except we seem to want a denomination for every power of 10 - it's more of an aesthetic thing.īut there's absolutely no practical reason for a $2. $0.05 to $0.25 to $1 to $5 to $20 to $100.Īdding mere doublings in there just complicates things for no good reason. The real question is more why it became popular anywhere else.Ĭurrency denominations seem to be efficient* when they follow roughly half-an-order-of-manitude increases - e.g.
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