27
3x3x3 = 27
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729, cube of 9 and square of 27
A perfect cube is the cube of an integer (whole number). This means that, for n to be a perfect cube, n = x3, x∈ℤ Eg. ±1 [=(±1)3], 8 [=(±2)3], ±27 [= (±3)3], etc.
The only number in that list which is not a square number is 27. 27 is a cube number.
Of a whole number? no. 2 x 2 x 2 = 8 3 x 3 x3 = 27
Yes because 3*3*3 = 27