| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.35 |
| Score | 0% | 67% |
What is \( \frac{4}{6} \) ÷ \( \frac{3}{9} \)?
| 2 | |
| \(\frac{1}{12}\) | |
| \(\frac{1}{5}\) | |
| \(\frac{4}{15}\) |
To divide fractions, invert the second fraction and then multiply:
\( \frac{4}{6} \) ÷ \( \frac{3}{9} \) = \( \frac{4}{6} \) x \( \frac{9}{3} \)
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{4}{6} \) x \( \frac{9}{3} \) = \( \frac{4 x 9}{6 x 3} \) = \( \frac{36}{18} \) = 2
If \( \left|y - 2\right| \) - 1 = -8, which of these is a possible value for y?
| 22 | |
| -9 | |
| 10 | |
| 9 |
First, solve for \( \left|y - 2\right| \):
\( \left|y - 2\right| \) - 1 = -8
\( \left|y - 2\right| \) = -8 + 1
\( \left|y - 2\right| \) = -7
The value inside the absolute value brackets can be either positive or negative so (y - 2) must equal - 7 or --7 for \( \left|y - 2\right| \) to equal -7:
| y - 2 = -7 y = -7 + 2 y = -5 | y - 2 = 7 y = 7 + 2 y = 9 |
So, y = 9 or y = -5.
What is the least common multiple of 5 and 7?
| 10 | |
| 7 | |
| 35 | |
| 27 |
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 have in common.
If there were a total of 250 raffle tickets sold and you bought 17 tickets, what's the probability that you'll win the raffle?
| 15% | |
| 1% | |
| 9% | |
| 7% |
You have 17 out of the total of 250 raffle tickets sold so you have a (\( \frac{17}{250} \)) x 100 = \( \frac{17 \times 100}{250} \) = \( \frac{1700}{250} \) = 7% chance to win the raffle.
What is \( \frac{1}{8} \) x \( \frac{3}{7} \)?
| \(\frac{3}{8}\) | |
| \(\frac{4}{27}\) | |
| \(\frac{3}{7}\) | |
| \(\frac{3}{56}\) |
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{1}{8} \) x \( \frac{3}{7} \) = \( \frac{1 x 3}{8 x 7} \) = \( \frac{3}{56} \) = \(\frac{3}{56}\)