| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.55 |
| Score | 0% | 71% |
The total water usage for a city is 25,000 gallons each day. Of that total, 15% is for personal use and 39% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 1,400 | |
| 7,200 | |
| 6,000 | |
| 10,350 |
39% of the water consumption is industrial use and 15% is personal use so (39% - 15%) = 24% more water is used for industrial purposes. 25,000 gallons are consumed daily so industry consumes \( \frac{24}{100} \) x 25,000 gallons = 6,000 gallons.
Which of the following is not a prime number?
2 |
|
5 |
|
9 |
|
7 |
A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.
10 members of a bridal party need transported to a wedding reception but there are only 4 2-passenger taxis available to take them. How many will need to find other transportation?
| 3 | |
| 8 | |
| 7 | |
| 2 |
There are 4 2-passenger taxis available so that's 4 x 2 = 8 total seats. There are 10 people needing transportation leaving 10 - 8 = 2 who will have to find other transportation.
Find the average of the following numbers: 8, 6, 9, 5.
| 6 | |
| 8 | |
| 12 | |
| 7 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{8 + 6 + 9 + 5}{4} \) = \( \frac{28}{4} \) = 7
Which of the following is a mixed number?
\({7 \over 5} \) |
|
\(1 {2 \over 5} \) |
|
\({5 \over 7} \) |
|
\({a \over 5} \) |
A rational number (or fraction) is represented as a ratio between two integers, a and b, and has the form \({a \over b}\) where a is the numerator and b is the denominator. An improper fraction (\({5 \over 3} \)) has a numerator with a greater absolute value than the denominator and can be converted into a mixed number (\(1 {2 \over 3} \)) which has a whole number part and a fractional part.