| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.01 |
| Score | 0% | 60% |
Which of these numbers is a factor of 64?
| 62 | |
| 64 | |
| 63 | |
| 29 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 64 are 1, 2, 4, 8, 16, 32, 64.
What is the next number in this sequence: 1, 3, 7, 13, 21, __________ ?
| 23 | |
| 27 | |
| 31 | |
| 39 |
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
What is 7c2 - 4c2?
| -3c-2 | |
| 3c-2 | |
| 3c2 | |
| 11c-4 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so subtract the coefficients and retain the base and exponent:
7c2 - 4c2
(7 - 4)c2
3c2
If a mayor is elected with 75% of the votes cast and 82% of a town's 44,000 voters cast a vote, how many votes did the mayor receive?
| 25,617 | |
| 30,307 | |
| 18,762 | |
| 27,060 |
If 82% of the town's 44,000 voters cast ballots the number of votes cast is:
(\( \frac{82}{100} \)) x 44,000 = \( \frac{3,608,000}{100} \) = 36,080
The mayor got 75% of the votes cast which is:
(\( \frac{75}{100} \)) x 36,080 = \( \frac{2,706,000}{100} \) = 27,060 votes.
On average, the center for a basketball team hits 30% of his shots while a guard on the same team hits 50% of his shots. If the guard takes 10 shots during a game, how many shots will the center have to take to score as many points as the guard assuming each shot is worth the same number of points?
| 17 | |
| 12 | |
| 20 | |
| 22 |
guard shots made = shots taken x \( \frac{\text{% made}}{100} \) = 10 x \( \frac{50}{100} \) = \( \frac{50 x 10}{100} \) = \( \frac{500}{100} \) = 5 shots
The center makes 30% of his shots so he'll have to take:
shots made = shots taken x \( \frac{\text{% made}}{100} \)
shots taken = \( \frac{\text{shots taken}}{\frac{\text{% made}}{100}} \)
to make as many shots as the guard. Plugging in values for the center gives us:
center shots taken = \( \frac{5}{\frac{30}{100}} \) = 5 x \( \frac{100}{30} \) = \( \frac{5 x 100}{30} \) = \( \frac{500}{30} \) = 17 shots
to make the same number of shots as the guard and thus score the same number of points.