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January 29, 2015

January 29, 2015

Posted by **Rose** on Tuesday, December 11, 2007 at 8:52pm.

- college math -
**Reiny**, Tuesday, December 11, 2007 at 10:42pmthere are 4 choices for your first digit, but no limitations for the remaining 3 digits.

so

4*10*10*10=4000 different numbers

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