| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
What is the least common multiple of 6 and 8?
| 39 | |
| 33 | |
| 24 | |
| 1 |
The first few multiples of 6 are [6, 12, 18, 24, 30, 36, 42, 48, 54, 60] 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 [24, 48, 72, 96] making 24 the smallest multiple 6 and 8 have in common.
What is -9z3 x 2z3?
| -18z6 | |
| -18z9 | |
| -7z9 | |
| -7z6 |
To multiply terms with exponents, the base of both exponents must be the same. In this case they are so multiply the coefficients and add the exponents:
-9z3 x 2z3
(-9 x 2)z(3 + 3)
-18z6
A bread recipe calls for 2 cups of flour. If you only have \(\frac{5}{8}\) cup, how much more flour is needed?
| 1\(\frac{1}{2}\) cups | |
| 1\(\frac{3}{8}\) cups | |
| 3\(\frac{1}{8}\) cups | |
| 1\(\frac{7}{8}\) cups |
The amount of flour you need is (2 - \(\frac{5}{8}\)) cups. Rewrite the quantities so they share a common denominator and subtract:
(\( \frac{16}{8} \) - \( \frac{5}{8} \)) cups
\( \frac{11}{8} \) cups
1\(\frac{3}{8}\) cups
4! = ?
4 x 3 |
|
4 x 3 x 2 x 1 |
|
3 x 2 x 1 |
|
5 x 4 x 3 x 2 x 1 |
A factorial has the form n! and is the product of the integer (n) and all the positive integers below it. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.
If the ratio of home fans to visiting fans in a crowd is 5:1 and all 39,000 seats in a stadium are filled, how many home fans are in attendance?
| 24,000 | |
| 32,500 | |
| 36,000 | |
| 30,000 |
A ratio of 5:1 means that there are 5 home fans for every one visiting fan. So, of every 6 fans, 5 are home fans and \( \frac{5}{6} \) of every fan in the stadium is a home fan:
39,000 fans x \( \frac{5}{6} \) = \( \frac{195000}{6} \) = 32,500 fans.