| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.97 |
| Score | 0% | 59% |
A tiger in a zoo has consumed 96 pounds of food in 8 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 156 pounds?
| 3 | |
| 11 | |
| 8 | |
| 5 |
If the tiger has consumed 96 pounds of food in 8 days that's \( \frac{96}{8} \) = 12 pounds of food per day. The tiger needs to consume 156 - 96 = 60 more pounds of food to reach 156 pounds total. At 12 pounds of food per day that's \( \frac{60}{12} \) = 5 more days.
What is \( \frac{6}{5} \) - \( \frac{5}{9} \)?
| 1 \( \frac{9}{13} \) | |
| \(\frac{29}{45}\) | |
| 1 \( \frac{5}{13} \) | |
| 1 \( \frac{8}{16} \) |
To subtract these fractions, first find the lowest common multiple of their denominators. The first few multiples of 5 are [5, 10, 15, 20, 25, 30, 35, 40, 45, 50] and the first few multiples of 9 are [9, 18, 27, 36, 45, 54, 63, 72, 81, 90]. The first few multiples they share are [45, 90] making 45 the smallest multiple 5 and 9 share.
Next, convert the fractions so each denominator equals the lowest common multiple:
\( \frac{6 x 9}{5 x 9} \) - \( \frac{5 x 5}{9 x 5} \)
\( \frac{54}{45} \) - \( \frac{25}{45} \)
Now, because the fractions share a common denominator, you can subtract them:
\( \frac{54 - 25}{45} \) = \( \frac{29}{45} \) = \(\frac{29}{45}\)
If a rectangle is twice as long as it is wide and has a perimeter of 42 meters, what is the area of the rectangle?
| 18 m2 | |
| 2 m2 | |
| 98 m2 | |
| 50 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 42 meters so the equation becomes: 2w + 2h = 42.
Putting these two equations together and solving for width (w):
2w + 2h = 42
w + h = \( \frac{42}{2} \)
w + h = 21
w = 21 - h
From the question we know that h = 2w so substituting 2w for h gives us:
w = 21 - 2w
3w = 21
w = \( \frac{21}{3} \)
w = 7
Since h = 2w that makes h = (2 x 7) = 14 and the area = h x w = 7 x 14 = 98 m2
A circular logo is enlarged to fit the lid of a jar. The new diameter is 55% larger than the original. By what percentage has the area of the logo increased?
| 22\(\frac{1}{2}\)% | |
| 37\(\frac{1}{2}\)% | |
| 30% | |
| 27\(\frac{1}{2}\)% |
The area of a circle is given by the formula A = πr2 where r is the radius of the circle. The radius of a circle is its diameter divided by two so A = π(\( \frac{d}{2} \))2. If the diameter of the logo increases by 55% the radius (and, consequently, the total area) increases by \( \frac{55\text{%}}{2} \) = 27\(\frac{1}{2}\)%
A factor is a positive __________ that divides evenly into a given number.
fraction |
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improper fraction |
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mixed number |
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integer |
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.