Hi there, I have just purchased the Self Study Guide Plus package, and was going through the welcome self study guide. I noticed the following page 9 (Structure and Content of GMAT...)

This page mentions that there are 2 optional breaks of 10 minutes each, whereas the information provided in the OG guides specifies 2 optional breaks of 5 minutes each.
I am assuming that the OG guides are correct, and your document contains the mistake.

Thanks in advance for your clarification.