| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.02 |
| Score | 0% | 60% |
A factor is a positive __________ that divides evenly into a given number.
fraction |
|
mixed number |
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integer |
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improper fraction |
A factor is a positive integer that divides evenly into a given number. For example, the factors of 8 are 1, 2, 4, and 8.
What is \( \frac{4}{9} \) ÷ \( \frac{3}{6} \)?
| \(\frac{8}{9}\) | |
| 8 | |
| \(\frac{12}{35}\) | |
| \(\frac{2}{21}\) |
To divide fractions, invert the second fraction and then multiply:
\( \frac{4}{9} \) ÷ \( \frac{3}{6} \) = \( \frac{4}{9} \) x \( \frac{6}{3} \)
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{4}{9} \) x \( \frac{6}{3} \) = \( \frac{4 x 6}{9 x 3} \) = \( \frac{24}{27} \) = \(\frac{8}{9}\)
If a mayor is elected with 57% of the votes cast and 90% of a town's 46,000 voters cast a vote, how many votes did the mayor receive?
| 23,598 | |
| 35,604 | |
| 29,808 | |
| 27,324 |
If 90% of the town's 46,000 voters cast ballots the number of votes cast is:
(\( \frac{90}{100} \)) x 46,000 = \( \frac{4,140,000}{100} \) = 41,400
The mayor got 57% of the votes cast which is:
(\( \frac{57}{100} \)) x 41,400 = \( \frac{2,359,800}{100} \) = 23,598 votes.
If a rectangle is twice as long as it is wide and has a perimeter of 48 meters, what is the area of the rectangle?
| 98 m2 | |
| 50 m2 | |
| 128 m2 | |
| 2 m2 |
The area of a rectangle is width (w) x height (h). In this problem we know that the rectangle is twice as long as it is wide so h = 2w. The perimeter of a rectangle is 2w + 2h and we know that the perimeter of this rectangle is 48 meters so the equation becomes: 2w + 2h = 48.
Putting these two equations together and solving for width (w):
2w + 2h = 48
w + h = \( \frac{48}{2} \)
w + h = 24
w = 24 - h
From the question we know that h = 2w so substituting 2w for h gives us:
w = 24 - 2w
3w = 24
w = \( \frac{24}{3} \)
w = 8
Since h = 2w that makes h = (2 x 8) = 16 and the area = h x w = 8 x 16 = 128 m2
The __________ is the smallest positive integer that is a multiple of two or more integers.
greatest common factor |
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absolute value |
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least common multiple |
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least common factor |
The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.