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5 February, 05:01

How many seven-digit numbers are there when 0, 7, and 2 cannot be the leading number?

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  1. 5 February, 05:20
    0
    9,000,000

    -2,000,000 (1,000,000 for each of the numbers taken out except 0, a number 7,000,000 can't start with 0 unless it is 0 or a decimal.)
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