Percent error Quiz
10 questions · easy to harder · Foundations · score and step-by-step answers
How it works
- 10 questions, about 20 minutes (a timer counts down; you can hide it). Solve it right here: no sign-up.
- 5 questions have choices. For the others you type the answer: a number like 4, −2, 7/2 or 3.5, or for example x = 4, x = 2 or x = −3, (3, 5), 2x + 1. Use ^ for powers (x^2) and sqrt for √. Any form with the same value counts (7/2 = 3.5).
- One question at a time: Back, Next, Mark for review and the question list at the bottom. No calculator: work it out on paper.
- At the end: your percent and grade, every question right or wrong, why a wrong choice is wrong, and its step-by-step solution. Then practise the lesson with new questions.
Your answers and results are kept in this browser only, so you can close the page and come back.
1 Question 1
Estimate 50, actual 40, percent error- A) 20%
- B) 25%
- C) 0.25%
- D) 10%
2 Question 2
Estimate 12, actual 10, percent errorType the answer.
3 Question 3
Estimate 90, actual 100, percent error- A) 0.1%
- B) 11110%
- C) 10%
- D) 100%
4 Question 4
Guess 33, actual 30, percent errorType the answer.
5 Question 5
Estimate 23, actual 30, percent error- A) 7%
- B) 0.233%
- C) 30.4%
- D) 23.3%
6 Question 6
Measured 4.8 m, actual 5 m, percent errorType the answer.
7 Question 7
Guess 70, actual 90, percent error- A) 22.2%
- B) 28.6%
- C) 20%
- D) 0.222%
8 Question 8
Estimate 1,100, actual 1,000, percent errorType the answer.
9 Question 9
Omar estimated 48 people. There were 64. What is the percent error?- A) 25%
- B) 16%
- C) 0.25%
- D) 33310%
10 Question 10
Sam guessed $15. It was $12. What is his percent error?Type the answer.