Question 21
The number of digits used to number the pages of a book is twice the number of pages of the book. If the number of pages is a three-digit number, how many pages does the book have?
Interpretation: Pages are numbered consecutively from 1, without leading zeros, and every page number is counted once.
Answer format: enter a whole number without units. Leading zeros are optional.
Interpretation: Pages are numbered consecutively from 1, without leading zeros, and every page number is counted once.
Answer format: enter a whole number without units. Leading zeros are optional.