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| F | G | H | I | J |
Further info
Tech
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Introduction Further info Tech |
| B1. Indices | |
| Cube root |    |
| 2 x 2 x 2=8, or 2³=8, so 8 is
the cube of 2. 2 is the cube root of 8. Similarly, 3³=27, so 27 is the cube of 3, and 3 is the cube root of 27. 4³=64, so 64 is the cube of 4, and 4 is the cube root of 64. 5³=125, so 125 is the cube of 5, and 5 is the cube root of 125. 6³=216, so 216 is the cube of 6, and 6 is the cube root of 216. You should know these cubes "by heart":
These cube numbers are often used in examination questions, so when you see them you should bear in mind that their cube root might be useful in solving the problem. The cube root of a number, n, can also be written as:  Practise your cubes. Press "To get" to get started and try to get 10 correct answers at least before you move on: |
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