If you got 16 questions correct on a test, and got 80 percent, then there are a total of 16 / (80/100) = 16/0.8 = 20 questions on the test.
You missed 3 questions.
41 questions (if you got 83 percent, then that means you got 34 questions right)
55
If every question was worth the same credit, you missed 18 of them.
10 questions
You missed 3 questions.
41 questions (if you got 83 percent, then that means you got 34 questions right)
55
You might not have missed any - you just got nearly half of them wrong.
If every question was worth the same credit, you missed 18 of them.
You passed. You got like 54 questions right that's over 50%
10 questions
If you're awarded 1 mark per question, and you got 77%, you missed roughly 25% of the questions, which is 15
3
My guess is that it wasn't a maths test. 32 X 0.82=26.24 so you missed 6. Your teacher gave you an extra mark as that comes to 81%.
40 questions
It can be 100 or 50 questions.