Let's say you have boxes 3, 4, and 5. The total of these boxes is 12. Which one of the boxes could you remove to make the total of the boxes equal the current goal, 7? Simply remove crate #5 by clicking on it, and then move on to the next problem.
Crunch is a math based arcade game in which you try to get the total (or product) of the crates to equal the number located on the bottom right of the screen.