Let me make one thing very straight, it's not about the number of questions that make you pass or fail, it's the type of questions which you answer. Every test has a specific number of questions which you MUST answer to get a passing grade which is 75, and this is the reason why you are always suggested to answer ALL of them. Previously, if after correcting all of hem you get more questions correct you used to get a score of 75+, depending again, on what type of questions you got right. Now let's say one test comprises of 400 Qs has a preset 175 questions which the examiners agreed that one must get right to get a passing score. Now, let's say someone got only these 175 right and everything else wrong.....he still gets a score of "pass". If, on the other hand, someone who got even one of these 175 wrong, and all of he other 225 right, so, according to numbers he got (174+225)= 399 out of 400 right, he still get a "fail" grade, just because he got that one important question wrong !!! So my dear friends, please do not get surprised if you get a score of "pass" even you were sure that you failed !!!