How many different 1, 2, or 3 digit whole numbers can be made using the digits 2,5, and 8? No digit may be repeated within 1 number.

Question

How many different 1, 2, or 3 digit whole numbers can be made using the digits 2,5, and 8? No digit may be repeated within 1 number.

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  1. Ava
    0
    2022-01-11T19:32:40+00:00

    With one digit you can only make three numbers, 2, 5, and 8.
    With two digits, _ _  there are 3 possibilities for the first digit and 2 in the second totaling 3*2 = 6 possibilities. 
    With three digits, _ _ _, there are 3 possibles in the first digit, 2 in the second and only 1 in the last. 3*2*1 = 6
    Now we add all of the possibilities – 3+6+6 = 15.

    Your final answer should be 15 numbers. Hope this helps!

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