| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
Which of the following is not an integer?
1 |
|
-1 |
|
0 |
|
\({1 \over 2}\) |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 35% off." If Monty buys two shirts, each with a regular price of $43, how much money will he save?
| $19.35 | |
| $6.45 | |
| $2.15 | |
| $15.05 |
By buying two shirts, Monty will save $43 x \( \frac{35}{100} \) = \( \frac{$43 x 35}{100} \) = \( \frac{$1505}{100} \) = $15.05 on the second shirt.
Find the average of the following numbers: 8, 6, 8, 6.
| 11 | |
| 9 | |
| 7 | |
| 10 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{8 + 6 + 8 + 6}{4} \) = \( \frac{28}{4} \) = 7
A circular logo is enlarged to fit the lid of a jar. The new diameter is 65% larger than the original. By what percentage has the area of the logo increased?
| 25% | |
| 17\(\frac{1}{2}\)% | |
| 32\(\frac{1}{2}\)% | |
| 20% |
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 65% the radius (and, consequently, the total area) increases by \( \frac{65\text{%}}{2} \) = 32\(\frac{1}{2}\)%
What is \( \frac{4}{6} \) ÷ \( \frac{1}{8} \)?
| 5\(\frac{1}{3}\) | |
| \(\frac{1}{5}\) | |
| 32 | |
| \(\frac{1}{40}\) |
To divide fractions, invert the second fraction and then multiply:
\( \frac{4}{6} \) ÷ \( \frac{1}{8} \) = \( \frac{4}{6} \) x \( \frac{8}{1} \)
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{4}{6} \) x \( \frac{8}{1} \) = \( \frac{4 x 8}{6 x 1} \) = \( \frac{32}{6} \) = 5\(\frac{1}{3}\)