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How many different ten digit number can be formed using the digits zero until nine excluding numbers starting with zero?
Wiki User
∙ 16y ago
If you exclude numbers starting with zero then the first digit must be between 1 and 9 (i.e. 9 combinations). The remaining 9 digits can be any value between 0 and 9 (i.e. 10 combinations).
So you can have 9x109 = 9,000,000,000 combinations.
Wiki User
∙ 16y ago
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