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31 October, 14:54

How many four-digit numbers can be formed from the numbers 1,3,4,6,8 and 9 if repetition of digits is not allowed?

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  1. 31 October, 15:18
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    1,3,4,6,8,9

    6 algarismos

    6*5*4*3*2*1 = 720
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