| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.97 |
| Score | 0% | 59% |
A tiger in a zoo has consumed 24 pounds of food in 3 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 72 pounds?
| 8 | |
| 1 | |
| 2 | |
| 6 |
If the tiger has consumed 24 pounds of food in 3 days that's \( \frac{24}{3} \) = 8 pounds of food per day. The tiger needs to consume 72 - 24 = 48 more pounds of food to reach 72 pounds total. At 8 pounds of food per day that's \( \frac{48}{8} \) = 6 more days.
| 0.2 | |
| 1 | |
| 1.2 | |
| 2.4 |
1
7 members of a bridal party need transported to a wedding reception but there are only 2 3-passenger taxis available to take them. How many will need to find other transportation?
| 8 | |
| 2 | |
| 7 | |
| 1 |
There are 2 3-passenger taxis available so that's 2 x 3 = 6 total seats. There are 7 people needing transportation leaving 7 - 6 = 1 who will have to find other transportation.
A bread recipe calls for 2\(\frac{1}{8}\) cups of flour. If you only have 1\(\frac{3}{4}\) cups, how much more flour is needed?
| 2\(\frac{1}{2}\) cups | |
| 1\(\frac{3}{8}\) cups | |
| \(\frac{3}{8}\) cups | |
| 3\(\frac{1}{8}\) cups |
The amount of flour you need is (2\(\frac{1}{8}\) - 1\(\frac{3}{4}\)) cups. Rewrite the quantities so they share a common denominator and subtract:
(\( \frac{17}{8} \) - \( \frac{14}{8} \)) cups
\( \frac{3}{8} \) cups
\(\frac{3}{8}\) cups
A machine in a factory has an error rate of 5 parts per 100. The machine normally runs 24 hours a day and produces 10 parts per hour. Yesterday the machine was shut down for 6 hours for maintenance.
How many error-free parts did the machine produce yesterday?
| 171 | |
| 195.3 | |
| 74.4 | |
| 91.2 |
The hourly error rate for this machine is the error rate in parts per 100 multiplied by the number of parts produced per hour:
\( \frac{5}{100} \) x 10 = \( \frac{5 \times 10}{100} \) = \( \frac{50}{100} \) = 0.5 errors per hour
So, in an average hour, the machine will produce 10 - 0.5 = 9.5 error free parts.
The machine ran for 24 - 6 = 18 hours yesterday so you would expect that 18 x 9.5 = 171 error free parts were produced yesterday.