| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.72 |
| Score | 0% | 74% |
4! = ?
5 x 4 x 3 x 2 x 1 |
|
4 x 3 |
|
4 x 3 x 2 x 1 |
|
3 x 2 x 1 |
A factorial has the form n! and is the product of the integer (n) and all the positive integers below it. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.
Latoya scored 91% on her final exam. If each question was worth 2 points and there were 140 possible points on the exam, how many questions did Latoya answer correctly?
| 79 | |
| 63 | |
| 64 | |
| 77 |
Latoya scored 91% on the test meaning she earned 91% of the possible points on the test. There were 140 possible points on the test so she earned 140 x 0.91 = 128 points. Each question is worth 2 points so she got \( \frac{128}{2} \) = 64 questions right.
What is the next number in this sequence: 1, 3, 5, 7, 9, __________ ?
| 11 | |
| 17 | |
| 2 | |
| 19 |
The equation for this sequence is:
an = an-1 + 2
where n is the term's order in the sequence, an is the value of the term, and an-1 is the value of the term before an. This makes the next number:
a6 = a5 + 2
a6 = 9 + 2
a6 = 11
Find the average of the following numbers: 17, 13, 16, 14.
| 18 | |
| 16 | |
| 17 | |
| 15 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{17 + 13 + 16 + 14}{4} \) = \( \frac{60}{4} \) = 15
In a class of 30 students, 10 are taking German and 14 are taking Spanish. Of the students studying German or Spanish, 7 are taking both courses. How many students are not enrolled in either course?
| 13 | |
| 29 | |
| 10 | |
| 23 |
The number of students taking German or Spanish is 10 + 14 = 24. Of that group of 24, 7 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 24 - 7 = 17 who are taking at least one language. 30 - 17 = 13 students who are not taking either language.