Why is it that commas(or decimals) are used to group sets of 3 digits together? Like for a million you usually see;(adsbygoogle = window.adsbygoogle || []).push({});

1,000,000

Why don't we group digits together in groups 4;

100,0000

Or since we use a base 10 numbering system, why not 5 or 10;

10,00000 or 1,0000000000

Is there something magical about the number 3 or is it just used because its easy to count? Why we're on the topic, why do we say 1 million is 1,000,000? Why isn't 1 million 1,000,0000?

If you haven't figure it out yet, I'm procrastinating from doing my homework.

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# Why do we put a comma after three digits when using big numbers?

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