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Math Help - digit nos

  1. #1
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    digit nos

    1. how many 3 digits number can be form from the digit 0,1,2,3,4,5,6,

    a. If each digit can be use
    b. How many of the nos are odd nos
    c. How many are greater than 300
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  2. #2
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    Quote Originally Posted by hany View Post
    1. how many 3 digits number can bfrom the digit 0,1,2,3,4,5,6,

    a. If each digit can be used
    b. How many of the nos are odd nos
    c. How many are greater than 300

    a) 6x7x7 (0 cant be first digit)

    b)6x7x3 (1,3,5 can be last digit)

    c) 4x7x7-1

    (for 3 ,4,5,6 ) and subtract 300


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