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Earn +20 ptsQ: How many 4 digit codes are possible?
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How many different 4-digit codes are possible if the last digit has to be zero?
There can be 103 = 1000 codes.
How many different 4-digit codes are possible if the digits cannot be repeated?
If you include 0000, ten thousand unique four digit codes are possible.
How many possible 4 digit 0 thru 9 codes?
If the first digit can be zero, there are 5,040. If the first digit can't be zero, there are only 4,536.
How many 3 digit codes can be made from 1 2 3 4 5 without repeating a digit?
this is impossible
How many 6 digit license plate codes are possible without repeating any digits?
10!/(10-6)! =10!/4! = 10*9*8*7*6*5 = 151200 different codes
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