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How many postive intergers less than 4000 with no repeated digits can be formewd where each digit is either 2, 3, 4, 5 or 6?

The answer is 133 but just dont know the working out..
2 years ago

Answers

oobleck
1st digit must be 2 or 3
so that gives you 2*4*3*2 = 48
2 years ago
Daniel
but the answer is 133
2 years ago

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