How difficult is the WorkKeys test?

My fiance had a successful interview at a company he’s wanted to work at for over two years. He has to go and take the WorkKeys test in four portions (1 hour each) in order to get the position.

I was just wondering if anyone here has taken this test before or has any tips. He found some practice tests on the website, but there are multiple levels so he doesn’t know where to start.

My fiance graduated high school in 2008 and is out of his groove, so to speak. He slacked off in school, so I’m worried he won’t do well.

Any information about this test would be great.