| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.41 |
| Score | 0% | 68% |
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 15% off." If Roger buys two shirts, each with a regular price of $15, how much will he pay for both shirts?
| $2.25 | |
| $20.25 | |
| $27.75 | |
| $22.50 |
By buying two shirts, Roger will save $15 x \( \frac{15}{100} \) = \( \frac{$15 x 15}{100} \) = \( \frac{$225}{100} \) = $2.25 on the second shirt.
So, his total cost will be
$15.00 + ($15.00 - $2.25)
$15.00 + $12.75
$27.75
Monty loaned Jennifer $1,000 at an annual interest rate of 2%. If no payments are made, what is the total amount owed at the end of the first year?
| $1,090 | |
| $1,020 | |
| $1,040 | |
| $1,050 |
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 $1,000
i = 0.02 x $1,000
No payments were made so the total amount due is the original amount + the accumulated interest:
total = $1,000 + $20What is \( \frac{4}{7} \) x \( \frac{4}{9} \)?
| \(\frac{16}{63}\) | |
| 1\(\frac{7}{9}\) | |
| \(\frac{2}{21}\) | |
| \(\frac{1}{54}\) |
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{4}{7} \) x \( \frac{4}{9} \) = \( \frac{4 x 4}{7 x 9} \) = \( \frac{16}{63} \) = \(\frac{16}{63}\)
A triathlon course includes a 200m swim, a 40.3km bike ride, and a 12.2km run. What is the total length of the race course?
| 46.8km | |
| 34.9km | |
| 28.4km | |
| 52.7km |
To add these distances, they must share the same unit so first you need to first convert the swim distance from meters (m) to kilometers (km) before adding it to the bike and run distances which are already in km. To convert 200 meters to kilometers, divide the distance by 1000 to get 0.2km then add the remaining distances:
total distance = swim + bike + run
total distance = 0.2km + 40.3km + 12.2km
total distance = 52.7km
What is the least common multiple of 5 and 7?
| 15 | |
| 35 | |
| 5 | |
| 31 |
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.