Guys, please help for study

Guys,

which is the best way to prepare for psychometric test like UKCAT or BMAT.Just to give you an idea: I am struggling with abstract reasoning part.I know that the main secret is practice, practice and practice, but however I would like to understand the main principle, how does it work because when I see the picture I can reccognise some patterns but now everything enough to give the right answer.Should i read the explanations of the every single question or I have simply memorize this 20-30 rules to spot the patterns ?.I want to do it the best guys but I don't know how and where to start from.This book: 1250 UKCAT question is good , but I would say quite difficult for beginner like me in this filed .Some other books maybe or video tutoring ?Guys, please help with advice...

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