A chapter in a book begins on page 142 and ends on page 857. How many pages are in the chapter?

Question

This is all the information I was given for the story problem. Maybe I am just overthinking it but please help.

Answer 1

if the chapter started on page 6 and ended on page 10, there would be 5 pages, 6,7,8,9, and 10

10-6=4, 4+1=5

therefore...

857-142=715, 715+1=716 pages