alleryHow many digits does the decimal system use to write numbers?
AEight
BNine
CTwelve
DTen
Answer & Solution
Correct answer: D. Ten
1. The decimal system uses the symbols 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.
2. Counting them gives ten digits.
3. Nine would leave out zero, which is also a digit.
_Source: Wikipedia, Natural number, lead section_
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