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| Math Central | Quandaries & Queries |
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Question from Kristin, a parent: If the sum of the digits of a whole number is 200, the whole number may not have ________ digits? |
Kristin,
I am not sure what is expected here. Here is one suggestion. Since each digit is 9 or less and 9 × 22 = 198 you can say that the whole number may not have less than 23 digits.
Penny
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