| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.48 |
| Score | 0% | 70% |
What is the greatest common factor of 48 and 36?
| 6 | |
| 12 | |
| 19 | |
| 25 |
The factors of 48 are [1, 2, 3, 4, 6, 8, 12, 16, 24, 48] and the factors of 36 are [1, 2, 3, 4, 6, 9, 12, 18, 36]. They share 6 factors [1, 2, 3, 4, 6, 12] making 12 the greatest factor 48 and 36 have in common.
Latoya scored 77% on her final exam. If each question was worth 2 points and there were 60 possible points on the exam, how many questions did Latoya answer correctly?
| 21 | |
| 23 | |
| 15 | |
| 36 |
Latoya scored 77% on the test meaning she earned 77% of the possible points on the test. There were 60 possible points on the test so she earned 60 x 0.77 = 46 points. Each question is worth 2 points so she got \( \frac{46}{2} \) = 23 questions right.
If \( \left|y + 2\right| \) - 9 = 6, which of these is a possible value for y?
| 9 | |
| 5 | |
| 13 | |
| -1 |
First, solve for \( \left|y + 2\right| \):
\( \left|y + 2\right| \) - 9 = 6
\( \left|y + 2\right| \) = 6 + 9
\( \left|y + 2\right| \) = 15
The value inside the absolute value brackets can be either positive or negative so (y + 2) must equal + 15 or -15 for \( \left|y + 2\right| \) to equal 15:
| y + 2 = 15 y = 15 - 2 y = 13 | y + 2 = -15 y = -15 - 2 y = -17 |
So, y = -17 or y = 13.
What is \( \frac{2}{5} \) + \( \frac{4}{7} \)?
| \(\frac{34}{35}\) | |
| 1 \( \frac{6}{35} \) | |
| 2 \( \frac{5}{12} \) | |
| 2 \( \frac{1}{6} \) |
To add these fractions, first find the lowest common multiple of their denominators. The first few multiples of 5 are [5, 10, 15, 20, 25, 30, 35, 40, 45, 50] and the first few multiples of 7 are [7, 14, 21, 28, 35, 42, 49, 56, 63, 70]. The first few multiples they share are [35, 70] making 35 the smallest multiple 5 and 7 share.
Next, convert the fractions so each denominator equals the lowest common multiple:
\( \frac{2 x 7}{5 x 7} \) + \( \frac{4 x 5}{7 x 5} \)
\( \frac{14}{35} \) + \( \frac{20}{35} \)
Now, because the fractions share a common denominator, you can add them:
\( \frac{14 + 20}{35} \) = \( \frac{34}{35} \) = \(\frac{34}{35}\)
What is the next number in this sequence: 1, 10, 19, 28, 37, __________ ?
| 43 | |
| 50 | |
| 51 | |
| 46 |
The equation for this sequence is:
an = an-1 + 9
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 + 9
a6 = 37 + 9
a6 = 46