ASVAB help?

I'm a returning to take my ASVAB downtown at MEPS sometime the end of this month or early November. I've studied for six months and it's been great but I've been doing bad on one subject. I'm struggling on Arithmetic Reasoning. I can't find a tutor so I've been trying to get help from everyone I know and myself but my score isn't changing. All of my other subjects I've pulled up but Arithmetic Reasoning is a *****.

I'm wanting to join the AirForce. It has been my dream sense I've been a kid. I graduated high school going on two years now and I work for a living. I've like nine subjects to test on at MEPS. There are four test out of the AFQT(word knowledge, paragraph comprehension, mathematical knowledge, and Arithmetic Reasoning). What if I did good on three of them and did bad on one(Arithmetic Reasoning?