How many cubes with edge of 1cm are needed to make a cube with edge of 3cm?

3 ³ = 27

3x3x3=27

27

only 1, but it will have 1/27th the density.

3^3
= 3 x 3 x 3
= 27

27 (the difference between my answer and all the rest is that i hope you'll vote mine as the best :)) )

3x3x3=27

27

If they are 1cm each, then three of them equals 3cm. That equals a 1cm by 3cm square so the equation is just 3x3x3, or 3 cubed. 27 1cm cubes make a 3cm cube

3^3=27