Hello. I'm curious about the significance of the number 10. Is 10 a significant number in mathematics? In metrics, currency, and percentages 10 is an increment that people often use.

My questions:

1. Is 10 indeed a significant number in mathematics? If so, how is it significant?

2. Would the number 10 be significant in metrics, currency, and percentages, if humas had 12 fingers, instead of 10?

3. Is 10 mathematically, or universally significant, or is it significant becaue humans have 10 fingers? Would 10 be as significant of a number to aliens with 6 fingers for example?