Best Answer

A test score of "90" represents the percentage of correct questions. Multiply this percentage by the total number of questions and you will have the number of questions correctly answered. Subtract this from the total to find answers wrong. 90% of 40 questions = .90 x 40 = 36 questions right. 40-36 = 4 answers wrong.

Lvl 1

thanks

Q: You got 90 on a test that has exactly 40 questions how many questions did you get wrong?

Write your answer...

Submit

Still have questions?

Continue Learning about Other Math

In order to score exactly 70% on a test with exactly 70 questions ... if every questionis worth the same credit ... you have to get 21answers wrong. You can do it.

You can get up to 150 questions wrong.

To pass the test you need 70% of the questions right.

5

You can get them all wrong. You won't pass the test, but that is not a requirement of the question.

Related questions

In order to score exactly 70% on a test with exactly 70 questions ... if every questionis worth the same credit ... you have to get 21answers wrong. You can do it.

You can get up to 150 questions wrong.

To pass the test you need 70% of the questions right.

5

You can get them all wrong. You won't pass the test, but that is not a requirement of the question.

20

11

37 questions wrong gives you a 70.2% correct.

no more than 7

69 questions

90% of 80 right means 10% of 80 wrong, which means 10/100 x 80 = 1/10 x 80 = 1/1 x 8 = 8 questions wrong.

39