the total number of digits used in numbering the pages of a book having 366 pages is
a. 732 b. 990
c. 1098 d. 1305

Pages 1-9 will each have one digit.
Pages 10-99 will each have two digits.
Pages 100-366 will each have three digits.

There are 9 pages with one digit, 90 pages with two digits, and 267 pages with three digits each. So, the total number of digits = 1*9 + 2*90 + 3*267 = 990.
The correct answer is B.

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