It's not.
4.11 is less than 4.2, even though it has more digits than 4.2 has.
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§ In comparing two whole numbers, the one with the most digits is always the greater number. § In decimals the number with the greatest number of digits is not always the greatest.
The greatest common factor is the highest number that can be divided equally into two or more numbers.
The question is based on an ignorance of what an atomic number is. It represents the number of protons in an atom of the element and is always, ALWAYS a whole number.
How do i know????? That is the most complicated question in the whole world!
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