600 of them.
600 of them.
600 of them.
600 of them.
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2
2222
9
24 three digit numbers if repetition of digits is not allowed. 4P3 = 24.If repetition of digits is allowed then we have:For 3 repetitions, 4 three digit numbers.For 2 repetitions, 36 three digit numbers.So we have a total of 64 three digit numbers if repetition of digits is allowed.
If you want 4-digit numbers, there are 24 of them.