SOLUTION: A company ID card contains 7 digits, such as 92, 71, 042. How many different ID numbers can be formed?

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Question 631157: A company ID card contains 7 digits, such as 92, 71, 042.
How many different ID numbers can be formed?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
92, 71, 042.
If 00 & 000 are allowed then:
100*100*1000=10,000,000 ans.
If not allowed:
99*99*999=9,791,199 ans.