Humans can use this method aswell to solve problems, but it's best suited for computers due to it's 'boring' nature.
Reading a book form the start, read what page you are on and the turn to the next page. Then stop when you are at the right page.
Non-bruteforce solving of the same problem.
Do an estimation of where the page might be. Open the book at that page. Read the page number of that page and do a new estimation till you are at the desierd page.