Mathematics

Question

How many different numbers can you make out of 1,2,3 and they can't have two of the same numbers in 1 problem ( can't be decimals) I think it 15?

1 Answer

  • there are 3 different numbers
    slot method

    how many 3 digit numbers?
    321
    312
    123
    132
    213
    231
     

    6 numbes

    how many 2 digit numbers?
    12
    21
    13
    31
    23
    32

    6 numbers

    how many 1 digit numbers
    1
    2
    3

    3 of them

    6+6+3=15


    15 different number, yah you ar right
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