keith-patel_60addecdbc19a
keith-patel_60addecdbc19a
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Com os algarismos 1, 2, 3, 4, 5, 6, 7, 8, 9 quantos números com algarismos distintos existem de 1 até 1000? Com 1 algarismo: 9 Com 2 algarismo: 9*8 =72 Com 2 algarismo: 9*8*7 =504 (9+72+504) = 585