Find the odd man out

Find the odd man out. 187, 264, 386, 473, 682, 781

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

~8 minAnswer checked instantly

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #3457

Stuck? A gentle nudge

No hints for this one.

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