SOLUTION: How many different 4-digit numbers can be created if no digit can be repeated? Remember, a number cannot begin with 0
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Question 183649: How many different 4-digit numbers can be created if no digit can be repeated? Remember, a number cannot begin with 0 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! How many different 4-digit numbers can be created if no digit can be repeated? Remember, a number cannot begin with 0
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1st digit : 9 ways
2nd digit : 9 ways
3rd digit : 8 ways
4th digit : 7 ways
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Ans: 81 * 56 = 4536
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Cheers,
Stan H.
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