| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.58 |
| Score | 0% | 72% |
Which of the following is not an integer?
0 |
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-1 |
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1 |
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\({1 \over 2}\) |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.
Find the average of the following numbers: 10, 6, 11, 5.
| 3 | |
| 8 | |
| 11 | |
| 4 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{10 + 6 + 11 + 5}{4} \) = \( \frac{32}{4} \) = 8
What is the least common multiple of 4 and 12?
| 12 | |
| 40 | |
| 26 | |
| 22 |
The first few multiples of 4 are [4, 8, 12, 16, 20, 24, 28, 32, 36, 40] and the first few multiples of 12 are [12, 24, 36, 48, 60, 72, 84, 96]. The first few multiples they share are [12, 24, 36, 48, 60] making 12 the smallest multiple 4 and 12 have in common.
If \(\left|a\right| = 7\), which of the following best describes a?
a = 7 or a = -7 |
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a = -7 |
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none of these is correct |
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a = 7 |
The absolute value is the positive magnitude of a particular number or variable and is indicated by two vertical lines: \(\left|-5\right| = 5\). In the case of a variable absolute value (\(\left|a\right| = 5\)) the value of a can be either positive or negative (a = -5 or a = 5).
The __________ is the greatest factor that divides two integers.
least common multiple |
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absolute value |
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greatest common multiple |
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greatest common factor |
The greatest common factor (GCF) is the greatest factor that divides two integers.