8
Each question is worth 2.5 percent. You can get 8 wrong.
You can get 60 questions wrong and get a 70 percent but if you get 61 wrong you are at a 69.5 percent.
69 questions
20
22 questions can be wrong. This means that you would have to get 33 marks, which is 60%
Each question is worth 2.5 percent. You can get 8 wrong.
You can get 60 questions wrong and get a 70 percent but if you get 61 wrong you are at a 69.5 percent.
69 questions
Nine.
20
22 questions can be wrong. This means that you would have to get 33 marks, which is 60%
You can get 20 questions wrong.
10 can be wrong and 30 right; 30/40 = 75%
Well, darling, to get an 80 percent on a 70-question test, you can afford to get 14 questions wrong. As long as you nail the rest of those questions, you'll be golden. Just remember, it's not about how many you get wrong, it's about how many you get right.
14 of them.
30
5