what percentage do you need to pass driving theory test

You’ll get a letter with a pass certificate number at the test centre. You need this when you book and take your driving test.
Your pass certificate number lasts for 2 years. You must pass your driving test in that time, otherwise you’ll have to pass the theory test again.

What percentage do you need to pass driving theory test
We’ve analysed the data from the last 100,000 quiz attempts on this site. We’ve then looked at the percentage of people that got each question correct. This has revealed the most difficult theory test questions.
Because so many people use our site to test their knowledge, we have a rich history of data on each test question (over 1,000 multiple choice questions from the DVSA revision question bank). This means we can see which questions people struggle with and which ones they find easy.

You can also practice the hazard perception test and the video clip test for free.
The test has 50 questions, and you need to get 43 right to pass. You have 57 minutes to do it.

Learner drivers take a driving theory test and a practical test. You need to pass the theory test to obtain your provisional licence.
When you apply for your provisional licence, see, you will receive a confirmation from your canton’s road traffic office. You need this to be able to book your theory test online. In some cantons you can choose a date for the exam from a list on the application form and send it back by post.

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References:

http://highwaycodetest.co.uk/most-difficult-theory-test-questions/
http://www.safedrivingforlife.info/take-official-free-practice-driving-theory-test/car-practice-theory-tests/car-practice-test-one
http://www.ch.ch/en/driving-theory-test/
http://www.aa.co.nz/drivers/driver-licences/learner-driver-licences/
http://www.gov.uk/theory-test/pass-mark-and-result