| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.61 |
| Score | 0% | 72% |
Which of these numbers is a factor of 28?
| 7 | |
| 25 | |
| 10 | |
| 19 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 28 are 1, 2, 4, 7, 14, 28.
What is \( 7 \)\( \sqrt{27} \) - \( 4 \)\( \sqrt{3} \)
| 3\( \sqrt{0} \) | |
| 17\( \sqrt{3} \) | |
| 28\( \sqrt{9} \) | |
| 28\( \sqrt{27} \) |
To subtract these radicals together their radicands must be the same:
7\( \sqrt{27} \) - 4\( \sqrt{3} \)
7\( \sqrt{9 \times 3} \) - 4\( \sqrt{3} \)
7\( \sqrt{3^2 \times 3} \) - 4\( \sqrt{3} \)
(7)(3)\( \sqrt{3} \) - 4\( \sqrt{3} \)
21\( \sqrt{3} \) - 4\( \sqrt{3} \)
Now that the radicands are identical, you can subtract them:
21\( \sqrt{3} \) - 4\( \sqrt{3} \)Which of the following is a mixed number?
\({7 \over 5} \) |
|
\({5 \over 7} \) |
|
\({a \over 5} \) |
|
\(1 {2 \over 5} \) |
A rational number (or fraction) is represented as a ratio between two integers, a and b, and has the form \({a \over b}\) where a is the numerator and b is the denominator. An improper fraction (\({5 \over 3} \)) has a numerator with a greater absolute value than the denominator and can be converted into a mixed number (\(1 {2 \over 3} \)) which has a whole number part and a fractional part.
What is the next number in this sequence: 1, 9, 17, 25, 33, __________ ?
| 41 | |
| 46 | |
| 39 | |
| 34 |
The equation for this sequence is:
an = an-1 + 8
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 + 8
a6 = 33 + 8
a6 = 41
Which of the following is not an integer?
0 |
|
1 |
|
-1 |
|
\({1 \over 2}\) |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.