I noticed that South Asians often write 10,00,000 instead of 1,000,000. My questions are:
- What is the origin of this special numbering system? Was there a more practical reason for having a special numbering system for South Asia?
- Why hasn't modern South Asia reformed this redundancy, just using "millions" everywhere? Most other aspects of numbers seem to be completely coherent. There is no special numbering system for Spanish-speaking countries. Nor, there is a special numbering system for the People's Republic of China, Korea and Japan.
A good example is the the game show "Who Wants to Be a Millionaire" became "Kaun Banega Crorepati" in India.