yes, one of my friends, who works aggressively on brain teasers, got accepted to a job offer due to ability to solve such questions. however he told me that he

yes, one of my friends, who works aggressively on brain teasers, got accepted to a job offer due to ability to solve such questions. however he told me that he knows thousands of variations of such problems. When asked he just pretends as if he is thinking to solve them, but he said most interviewers indeed are at a beginner level for such questions.