Q: How many whole numbers have exactly three digits when 999 is the greatest whole number with three digits is 890 900 990 or 999?

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Because in our system of numbers 100,000 is greater than 99,999.

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To be honest, numbers go on and on. (they never stop). So it's infinite. The least number would be Negative ( - ) About zillions of digits of numbers.

The positional place values of digits in negative numbers are in ascending order from least to greatest as for example in the number -987 the least value digit is 9 and the greatest value digit is 7 because -900 < -80 < -7 The positional place values of digits in positive numbers are in descending order from greatest to least as for example in the number 987 the least value digit is 7 and the greatest value digit is 9 because 900 > 80 > 7

no, it matters with the number not digits

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All numbers are made with digits and there is no limit on how big they can be. So there is no greatest number.

The significant digits in a number can be arbitrarily small or large in number, according to the method of creating them.Numbers that can have an infinite number of possible significant digits are called transcendental numbers.

Assuming that 001, 080, etc are not allowed (that is a leading zero or two is not permitted), the smallest number with exactly three digits is 100. The largest number with exactly three digits is 999. So there are 999 - 100 + 1 = 900 numbers with exactly three digits.

§ 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 possible number is 888... (repeating).

Because in our system of numbers 100,000 is greater than 99,999.

2

To be honest, numbers go on and on. (they never stop). So it's infinite. The least number would be Negative ( - ) About zillions of digits of numbers.

The positional place values of digits in negative numbers are in ascending order from least to greatest as for example in the number -987 the least value digit is 9 and the greatest value digit is 7 because -900 < -80 < -7 The positional place values of digits in positive numbers are in descending order from greatest to least as for example in the number 987 the least value digit is 7 and the greatest value digit is 9 because 900 > 80 > 7

no, it matters with the number not digits

That's called the greatest common factor, or GCF.

The greatest 4-digit number with no repeated digits is... 9876