| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.31 |
| Score | 0% | 66% |
A tiger in a zoo has consumed 24 pounds of food in 2 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 108 pounds?
| 1 | |
| 2 | |
| 7 | |
| 8 |
If the tiger has consumed 24 pounds of food in 2 days that's \( \frac{24}{2} \) = 12 pounds of food per day. The tiger needs to consume 108 - 24 = 84 more pounds of food to reach 108 pounds total. At 12 pounds of food per day that's \( \frac{84}{12} \) = 7 more days.
What is the least common multiple of 8 and 16?
| 96 | |
| 75 | |
| 111 | |
| 16 |
The first few multiples of 8 are [8, 16, 24, 32, 40, 48, 56, 64, 72, 80] and the first few multiples of 16 are [16, 32, 48, 64, 80, 96]. The first few multiples they share are [16, 32, 48, 64, 80] making 16 the smallest multiple 8 and 16 have in common.
If \( \left|x + 1\right| \) + 5 = -2, which of these is a possible value for x?
| 6 | |
| 0 | |
| 3 | |
| -9 |
First, solve for \( \left|x + 1\right| \):
\( \left|x + 1\right| \) + 5 = -2
\( \left|x + 1\right| \) = -2 - 5
\( \left|x + 1\right| \) = -7
The value inside the absolute value brackets can be either positive or negative so (x + 1) must equal - 7 or --7 for \( \left|x + 1\right| \) to equal -7:
| x + 1 = -7 x = -7 - 1 x = -8 | x + 1 = 7 x = 7 - 1 x = 6 |
So, x = 6 or x = -8.
A sports card collection contains football, baseball, and basketball cards. If the ratio of football to baseball cards is 3 to 2 and the ratio of baseball to basketball cards is 3 to 1, what is the ratio of football to basketball cards?
| 9:6 | |
| 1:6 | |
| 9:2 | |
| 7:1 |
The ratio of football cards to baseball cards is 3:2 and the ratio of baseball cards to basketball cards is 3:1. 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 9:6 and the ratio of baseball cards to basketball cards as 6:2. So, the ratio of football cards to basketball cards is football:baseball, baseball:basketball or 9:6, 6:2 which reduces to 9:2.
What is the distance in miles of a trip that takes 9 hours at an average speed of 15 miles per hour?
| 45 miles | |
| 165 miles | |
| 75 miles | |
| 135 miles |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)Solving for distance:
distance = \( \text{speed} \times \text{time} \)
distance = \( 15mph \times 9h \)
135 miles