SOLUTION: How do you solve: Given the set: 0,1,2,3,4,5,6 How many three-digit numbers without repeated digits are possible? Thank you!

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Question 371522: How do you solve:
Given the set: 0,1,2,3,4,5,6
How many three-digit numbers without repeated digits are possible?
Thank you!
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Is a leading zero allowed? eg 012 ?
If so, it's 7*6*5 = 210
If not, it's 6*6*5 = 180