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To talk about how many different numbers can be combined using 1, 2, 3.

Asked by: Aaron Scott 214 views IT July 19, 2021

To talk about how many different numbers can be combined using 1, 2, 3.

1 Answers

  1. +8Votes  

    1, 2, 3 These three characters can be combined into three different numbers: 1, 2, 3.

    cannot be repeated, it can be combined into three different digits: 1, 2, 3;

    6 different twoNumber of digits: 12, 13, 21, 23, 31, 32;

    6 different three digits: 123, 132, 213, 231, 312, 321;

    can be repeated, it can be combined into three different digits: 1, 2, 3;

    9 different two digits: 11, 12, 1321, 22, 23, 31, 32, 33;

    27 different three digits: 111, 112, 113, 121, 122, 123, 131, 132, …

    81 different four digits: 1111, …

    Karen Scott- July 19, 2021 |