personally i was shocked when i got to the recruiters office to take the flight apptitude test to obtain my oar. I actually had started the math test and had about 5 questions done when he came back to the test room to tell me that he had just read that I couldn't use it. i am just one of those young kids who hasn't ever performed a math problem without a calculator. but honestly the math problems on my test seemed much easier than those in my arco book, so I didnt really need it.