139
90. all the numbers from 10 through 99
There are 6484 digits BETWEEN the two given numbers.
223
-99
25 digits
192 digits
There are 2700 digits.
17
101
139
19 do.
90. all the numbers from 10 through 99
Twenty of them from 9 to 99
1 googol = 10100 = '1' followed by 100 zeroes. The number has (1 googol + 1) digits.
There are 6484 digits BETWEEN the two given numbers.
Write out the numbers 1 to 100. Count the number of times 1 appears.