Advanced Math practice question

Answer: 3

Ask which number cubed gives 27: 3 × 3 × 3 = 27, so x = 3. (For a cube, there is only one real solution.)

Common wrong answers

If you answered 9

9 is 27 / 3, or the SQUARE root of 81 — not the cube root of 27. Check: 9³ = 729.

If you answered 24

24 is 27 − 3. Cubing is not adding 3. Undo a cube with a cube root.

If you answered 81

81 is 27 × 3. The cube root of 27 is the number that, multiplied by itself three times, gives 27.

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