27
3x3x3 = 27
33 = 3x3x3 =27
3x3x3 cube has 27 cubes. One is in the middle and cannot be seen so the answer is 26.
3x3x3
3x9, 3x3x3, or 1x27
it is: 3x3= 6 6x3= 18
3 cubed = 3x3x3 27
27=3x3x3 therefore it is composite.
Know it yourself
54 units2
25
3x3x3=27