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How many different four-digit numbers can you make using all the digits in each set only once?
a. 1,2,3,4 b. 0,1,2,3 c. 0,0,1,2

  • Math -

    a. 4*3*2*1
    b. zero is not normally a leading digit, so it cant be used: 3*3*2*1
    c. 2*2*1 Think this one out.

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