It's a 10 based system after the first 1'000. Hardly a "redeeming" feature considering numbers are always read/parsed right to left (Arabic) and given the first

It's a 10 based system after the first 1'000. Hardly a "redeeming" feature considering numbers are always read/parsed right to left (Arabic) and given the first three digits separated for the thousands, the mind is already "trained" for the expected regular expression to parse. Booby trapped! 1 crore = 1,00,00,000 (written with accepted formatting). Which is 10'000'000 (formatted) - 10 million - for the rest of the world. Anyone used to the Western formatting will quickly get cockeyed seeing those numbers at a glance. I'd imagine it is just as jarring for the Indians seeing Western formats. https://en.wikipedia.org/wiki/Indian_numbering_system https://en.wikipedia.org/wiki/Indian_numbering_system