Look at this series: -2, 0, 2, 4

Look at this series: -2, 0, 2, 4,... What number should come next?

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 #20050