| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.35 |
| Score | 0% | 67% |
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 5% off." If Charlie buys two shirts, each with a regular price of $33, how much money will he save?
| $11.55 | |
| $9.90 | |
| $1.65 | |
| $3.30 |
By buying two shirts, Charlie will save $33 x \( \frac{5}{100} \) = \( \frac{$33 x 5}{100} \) = \( \frac{$165}{100} \) = $1.65 on the second shirt.
Find the average of the following numbers: 16, 12, 16, 12.
| 14 | |
| 12 | |
| 10 | |
| 18 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{16 + 12 + 16 + 12}{4} \) = \( \frac{56}{4} \) = 14
How many 1 gallon cans worth of fuel would you need to pour into an empty 10 gallon tank to fill it exactly halfway?
| 9 | |
| 6 | |
| 5 | |
| 5 |
To fill a 10 gallon tank exactly halfway you'll need 5 gallons of fuel. Each fuel can holds 1 gallons so:
cans = \( \frac{5 \text{ gallons}}{1 \text{ gallons}} \) = 5
A sports card collection contains football, baseball, and basketball cards. If the ratio of football to baseball cards is 5 to 2 and the ratio of baseball to basketball cards is 5 to 1, what is the ratio of football to basketball cards?
| 5:2 | |
| 5:6 | |
| 25:2 | |
| 5:4 |
The ratio of football cards to baseball cards is 5:2 and the ratio of baseball cards to basketball cards is 5:1. To solve this problem, we need the baseball card side of each ratio to be equal so we need to rewrite the ratios in terms of a common number of baseball cards. (Think of this like finding the common denominator when adding fractions.) The ratio of football to baseball cards can also be written as 25:10 and the ratio of baseball cards to basketball cards as 10:2. So, the ratio of football cards to basketball cards is football:baseball, baseball:basketball or 25:10, 10:2 which reduces to 25:2.
If a car travels 100 miles in 2 hours, what is the average speed?
| 60 mph | |
| 50 mph | |
| 25 mph | |
| 30 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)