Worked example
What is the cube root of 8?
Answer & why
Answer: 2
2 × 2 × 2 = 8, so the cube root is 2.
Grade 8 · Math
Find a perfect cube root
Connect a perfect cube with its whole-number cube root.
8 authored questions + worked example
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All questions
All 8 authored questions for this skill.
Question 1
What is the cube root of 512?
- 10
- 8
- 9
- 7
A hint
A cube root asks which number used as three equal factors gives the value.
Answer & why
Answer: 8
8 × 8 × 8 = 512, so the cube root is 8.
Question 2
What is the cube root of 729?
- 11
- 10
- 8
- 9
A hint
A cube root asks which number used as three equal factors gives the value.
Answer & why
Answer: 9
9 × 9 × 9 = 729, so the cube root is 9.
Question 3
What is the cube root of 8?
- 3
- 4
- 2
- 1
A hint
A cube root asks which number used as three equal factors gives the value.
Answer & why
Answer: 2
2 × 2 × 2 = 8, so the cube root is 2.
Question 4
What is the cube root of 27?
- 4
- 3
- 2
- 5
A hint
A cube root asks which number used as three equal factors gives the value.
Answer & why
Answer: 3
3 × 3 × 3 = 27, so the cube root is 3.
Question 5
What is the cube root of 64?
- 4
- 3
- 6
- 5
A hint
A cube root asks which number used as three equal factors gives the value.
Answer & why
Answer: 4
4 × 4 × 4 = 64, so the cube root is 4.
Question 6
What is the cube root of 125?
- 6
- 5
- 7
- 4
A hint
A cube root asks which number used as three equal factors gives the value.
Answer & why
Answer: 5
5 × 5 × 5 = 125, so the cube root is 5.
Question 7
What is the cube root of 216?
- 6
- 7
- 8
- 5
A hint
A cube root asks which number used as three equal factors gives the value.
Answer & why
Answer: 6
6 × 6 × 6 = 216, so the cube root is 6.
Question 8
What is the cube root of 343?
- 7
- 6
- 9
- 8
A hint
A cube root asks which number used as three equal factors gives the value.
Answer & why
Answer: 7
7 × 7 × 7 = 343, so the cube root is 7.