The questions on the OLSAT Level G test are multiple-choice questions.
We would recommend preparing for the exam to answer the questions to the best of your ability, making a judgment call on the most logical answer to a question, rather than a blank guess with no substance behind the answer.
However, a student will not be penalized if they have guessed some of the questions. They would get the same score for that question as they would if they left it blank.
It will not hurt their score if it has been guessed incorrectly.