I can say that, after many years, the written part can be tricky. I got my license at 16 in MA. I went for my motorcycle permit at 25 and the written test was heavily skewed towards 16 year olds getting their car permit. Half of the questions were obscure things from driver's ed manuals that no one really needs to know on a daily basis. I passed by the skin of my teeth after getting 100% on it nine years earlier!