All of them - you'd fail, but the question did not say anything about passing the test!
You can get 18 wrong.
87 and 30 is 117 wrong.
You can get 60 questions wrong, which leaves you with 140 answers correct, giving you 70%.
He got 6 wrong.
39
You can get 20 questions wrong.
You can get up to 150 questions wrong.
152 questions for California.
5
It depends on how many questions there are.
30
14 of them.
5
http://dmvanswers.com/questions/297/How-many-questions-do-I-have-to-get-right-to-pass-drivers-permit-test
37 questions wrong gives you a 70.2% correct.
no more than 7
you can get 6 wrong. and you will have a 91% if u get more than that then u will be at an 89% (if the ?'s are not all worth the same amount u can get up to 6.5 wrong)