Question 625074
What is the digit in the trillions place of the largest 14- digit number?
9
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What is the greatest 15-digit number with three different digits?
987,999,... all 9's
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How many times does the digit 8 occur in a 2 digit- number?
In some, zero.  eg 37
Is some, once.  eg 84
In one, twice.  88
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How many times does the digit 1 occur in the tens place in the numbers from 100 to 1000?
Once per hundred.
10
110
210, etc
--> 10 times