How to speed up the memorization of a book that contains 5000 MCQ?

I am preparing the general knowledge book for an exam containing almost 5000 MCQ of English grammar to date of independence/ anthems time duration of famous countries.
It took me 24 hours to memorize 100-150 MCQs using the loci method because converting MCQs into visual images takes too long.
So how can I memorize all MCQs in less time?

Is there a way for you to learn the higher ideas of the questions than each individual question?