You might not have thought of this, but it's the quickest and easiest method to divide the sheets and takes a lot less space to do.
After you pull the bunch of patterns out of the magazine, open it to see the red line where it is to be cut. Then you just lift the first layer of paper - mind, ONLY THAT ONE LAYER, and pull the scissors or knife through for the whole length. Done! Now you can pull sideways to divide the two sheets you obtained.