A number when divided by 6 leaves a remainder 3

A number when divided by 6 leaves a remainder 3. When the square of the same number is divided by 6, the remainder is:

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 #65908