Question 12
A book has 450 pages. If Anna starts reading from page 57 and reads 7 pages forward, then 2 pages backward, and continues this pattern, how many times will she flip back the page until she reaches the end of the book?
Editorial interpretation: forward/backward distances are page-number moves; count each two-page backward episode once, and stop immediately upon reaching the final page.
Editorial interpretation: forward/backward distances are page-number moves; count each two-page backward episode once, and stop immediately upon reaching the final page.