| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.45 |
| Score | 0% | 69% |
Betty scored 89% on her final exam. If each question was worth 3 points and there were 270 possible points on the exam, how many questions did Betty answer correctly?
| 85 | |
| 80 | |
| 86 | |
| 93 |
Betty scored 89% on the test meaning she earned 89% of the possible points on the test. There were 270 possible points on the test so she earned 270 x 0.89 = 240 points. Each question is worth 3 points so she got \( \frac{240}{3} \) = 80 questions right.
Find the average of the following numbers: 12, 4, 11, 5.
| 11 | |
| 10 | |
| 8 | |
| 3 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{12 + 4 + 11 + 5}{4} \) = \( \frac{32}{4} \) = 8
Monty loaned Diane $600 at an annual interest rate of 4%. If no payments are made, what is the total amount owed at the end of the first year?
| $636 | |
| $624 | |
| $648 | |
| $630 |
The yearly interest charged on this loan is the annual interest rate multiplied by the amount borrowed:
interest = annual interest rate x loan amount
i = (\( \frac{6}{100} \)) x $600
i = 0.04 x $600
No payments were made so the total amount due is the original amount + the accumulated interest:
total = $600 + $24What is the greatest common factor of 60 and 52?
| 52 | |
| 4 | |
| 22 | |
| 2 |
The factors of 60 are [1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60] and the factors of 52 are [1, 2, 4, 13, 26, 52]. They share 3 factors [1, 2, 4] making 4 the greatest factor 60 and 52 have in common.
In a class of 24 students, 5 are taking German and 11 are taking Spanish. Of the students studying German or Spanish, 2 are taking both courses. How many students are not enrolled in either course?
| 10 | |
| 15 | |
| 11 | |
| 13 |
The number of students taking German or Spanish is 5 + 11 = 16. Of that group of 16, 2 are taking both languages so they've been counted twice (once in the German group and once in the Spanish group). Subtracting them out leaves 16 - 2 = 14 who are taking at least one language. 24 - 14 = 10 students who are not taking either language.