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How many times does the digit 1 occur in ten place in the numbers from 1 to 1000?
A five digit number with 9 is 99999. A number which is 1000 times larger (not 1000 times as large) is 99999000.
That looks like it should be the same as 10 times (the number of times the digit 1 occursin the units place in the numbers from 10 to 100), which would work out to 90 .
There are 280.
300 times.