Which of the following numbers is NOT a perfect cube?
Which of the following numbers is NOT a perfect cube?
27000 = 30 cubed, 1000 = 10 cubed, and 125 = 5 cubed, so all three are perfect cubes. 900 is not a perfect cube, since no whole number cubed gives exactly 900.
Re-check your working by substituting the answer back into the original question.