19 times in all, including twice in 66.
19.
The number 7 occurs once. The digit 7 occurs 20 times.
How many times does the digit 1 occur in ten place in the numbers from 1 to 1000?
20 times
19 times
ten times
963
24
48
11
20 times if you're counting by ones.
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 .