1 x 1 x 1 = 1    1 is a cube number
2 x 2 x 2 = 8    8 is a cube number

5 x 5 x 5 = 125    125 is a cube number
6 x 6 x 6 = 216    216 is a cube number
7 x 7 x 7 = 343    343 is a cube number
8 x 8 x 8 = 512    515 is a cube number
9 x 9 x 9 = 729    729 is a cube number

10 x 10 x 10 = 1000    1000 is a cube number

 

3 x 3 x 3 = 27   27 is a cube number
4 x 4 x 4 = 64   64 is a cube number