| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.64 |
| Score | 0% | 73% |
Which of these numbers is a factor of 56?
| 8 | |
| 31 | |
| 2 | |
| 59 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 56 are 1, 2, 4, 7, 8, 14, 28, 56.
How many hours does it take a car to travel 135 miles at an average speed of 45 miles per hour?
| 7 hours | |
| 3 hours | |
| 5 hours | |
| 6 hours |
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 time:
time = \( \frac{\text{distance}}{\text{speed}} \)
time = \( \frac{135mi}{45mph} \)
3 hours
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 45% off." If Charlie buys two shirts, each with a regular price of $17, how much will he pay for both shirts?
| $26.35 | |
| $19.55 | |
| $23.80 | |
| $9.35 |
By buying two shirts, Charlie will save $17 x \( \frac{45}{100} \) = \( \frac{$17 x 45}{100} \) = \( \frac{$765}{100} \) = $7.65 on the second shirt.
So, his total cost will be
$17.00 + ($17.00 - $7.65)
$17.00 + $9.35
$26.35
If a car travels 140 miles in 4 hours, what is the average speed?
| 35 mph | |
| 25 mph | |
| 60 mph | |
| 55 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)What is the next number in this sequence: 1, 3, 7, 13, 21, __________ ?
| 32 | |
| 35 | |
| 31 | |
| 24 |
The equation for this sequence is:
an = an-1 + 2(n - 1)
where n is the term's order in the sequence, an is the value of the term, and an-1 is the value of the term before an. This makes the next number:
a6 = a5 + 2(6 - 1)
a6 = 21 + 2(5)
a6 = 31