How many questions you have to answer correctly depends on how many points you can get for each question. Some questions require multiple answers, or you have to answer several partial questions. So you may also get a question partially right. You must get 65% of the total score to pass. At VCA-Basis this is a minimum of 2580 points out of 4000 points. For VOL-VCA and VIL-VCU this is a minimum of 4515 points out of the 7000 points available.