If that was a "How to become a Royal Marine" website test,costing money, not on the official RN/RM website & not the official 'Practice Test Booklet' supplied free from your AFCO, then I can't really give a definitive answer.
Best bet, seriously, is get a free practice test book from your AFCO (or additionally borrow a free psychometric testing book from your library) and practice against the clock. Speed is of the essence.
For RM, you need to aim for roughly at least 50% in all sections to be assured of passing.
Not aware it was ever possible to join directly as an aircrewman, so it's quite likely you were offered Naval Airman(Aircraft Handler), Diver & Royal Marine as they require an average Recruiting Test score. As you would imagine the more technical the trade (Phase two) training, the higher the score required.