| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.23 |
| Score | 0% | 65% |
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 20% off." If Bob buys two shirts, each with a regular price of $43, how much will he pay for both shirts?
| $55.90 | |
| $34.40 | |
| $77.40 | |
| $64.50 |
By buying two shirts, Bob will save $43 x \( \frac{20}{100} \) = \( \frac{$43 x 20}{100} \) = \( \frac{$860}{100} \) = $8.60 on the second shirt.
So, his total cost will be
$43.00 + ($43.00 - $8.60)
$43.00 + $34.40
$77.40
Which of the following is an improper fraction?
\({7 \over 5} \) |
|
\({a \over 5} \) |
|
\(1 {2 \over 5} \) |
|
\({2 \over 5} \) |
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.
The total water usage for a city is 50,000 gallons each day. Of that total, 22% is for personal use and 44% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 11,000 | |
| 6,600 | |
| 16,500 | |
| 6,300 |
44% of the water consumption is industrial use and 22% is personal use so (44% - 22%) = 22% more water is used for industrial purposes. 50,000 gallons are consumed daily so industry consumes \( \frac{22}{100} \) x 50,000 gallons = 11,000 gallons.
What is the least common multiple of 4 and 8?
| 3 | |
| 28 | |
| 18 | |
| 8 |
The first few multiples of 4 are [4, 8, 12, 16, 20, 24, 28, 32, 36, 40] and the first few multiples of 8 are [8, 16, 24, 32, 40, 48, 56, 64, 72, 80]. The first few multiples they share are [8, 16, 24, 32, 40] making 8 the smallest multiple 4 and 8 have in common.
Which of the following is not a prime number?
2 |
|
9 |
|
7 |
|
5 |
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.