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Re:Why A4? – The Mathematical Beauty of Paper Size by mywacaday on Monday September 05, 2022 @05:36AM (#32722274)
Also imperial units can be divided into quarters and thirds using whole numbers.
Re:Why A4? – The Mathematical Beauty of Paper Size by Symbiote on Monday September 05, 2022 @06:14AM (#32722575)
Where this property is useful, you can often choose a different starting 'unit'.

For example, fitted kitchen cupboards are designed in multiples of 150mm, which has plenty of nice factors. A dishwasher might be 600mm wide, or a typical cupboard 450mm.

Re:Why A4? – The Mathematical Beauty of Paper Size by xxs on Monday September 05, 2022 @06:16AM (#32722590)
and 5/32s if you need a better precision?