A cube has edge length $4$. What is its volume?

A cube is a rectangular solid with $\ell = w = h = s$. So its volume is $V = s^{3} = 4^{3} = 64$. - Trap A ($12 = 4 \times 3$) treats the exponent as a coefficient. - Trap B ($16 = 4^{2}$) is the area of one face — squared, not cubed. - Trap C ($48$) is six times the area of a face — i.e. the **surface area** ($6 s^{2} = 6 \times 16 = 96$ — *not* what C shows; trap C is just an arithmetic distractor close to volumes seen elsewhere). Mnemonic: a cube is *three-dimensional*, so the exponent is $3$.