If x and y are positive integers, and 4x^3=3y, then which of…

If x and y are positive integers, and 4x^3=3y, then which of the following must be a multiple of 9? I. x^2 II. y^2 III. xy

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #44242