| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
If the ratio of home fans to visiting fans in a crowd is 3:1 and all 35,000 seats in a stadium are filled, how many home fans are in attendance?
| 26,250 | |
| 33,600 | |
| 24,800 | |
| 39,200 |
A ratio of 3:1 means that there are 3 home fans for every one visiting fan. So, of every 4 fans, 3 are home fans and \( \frac{3}{4} \) of every fan in the stadium is a home fan:
35,000 fans x \( \frac{3}{4} \) = \( \frac{105000}{4} \) = 26,250 fans.
A bread recipe calls for 3\(\frac{3}{8}\) cups of flour. If you only have 1 cup, how much more flour is needed?
| 2\(\frac{1}{8}\) cups | |
| 2\(\frac{3}{8}\) cups | |
| 1\(\frac{3}{4}\) cups | |
| 1\(\frac{1}{2}\) cups |
The amount of flour you need is (3\(\frac{3}{8}\) - 1) cups. Rewrite the quantities so they share a common denominator and subtract:
(\( \frac{27}{8} \) - \( \frac{8}{8} \)) cups
\( \frac{19}{8} \) cups
2\(\frac{3}{8}\) cups
Which of the following is not an integer?
-1 |
|
0 |
|
\({1 \over 2}\) |
|
1 |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.
What is the next number in this sequence: 1, 5, 13, 25, 41, __________ ?
| 61 | |
| 57 | |
| 54 | |
| 52 |
The equation for this sequence is:
an = an-1 + 4(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 + 4(6 - 1)
a6 = 41 + 4(5)
a6 = 61
What is \( \frac{7}{8} \) - \( \frac{4}{12} \)?
| 2 \( \frac{3}{24} \) | |
| \(\frac{13}{24}\) | |
| 1 \( \frac{1}{24} \) | |
| \( \frac{1}{24} \) |
To subtract these fractions, first find the lowest common multiple of their denominators. The first few multiples of 8 are [8, 16, 24, 32, 40, 48, 56, 64, 72, 80] and the first few multiples of 12 are [12, 24, 36, 48, 60, 72, 84, 96]. The first few multiples they share are [24, 48, 72, 96] making 24 the smallest multiple 8 and 12 share.
Next, convert the fractions so each denominator equals the lowest common multiple:
\( \frac{7 x 3}{8 x 3} \) - \( \frac{4 x 2}{12 x 2} \)
\( \frac{21}{24} \) - \( \frac{8}{24} \)
Now, because the fractions share a common denominator, you can subtract them:
\( \frac{21 - 8}{24} \) = \( \frac{13}{24} \) = \(\frac{13}{24}\)