Find the greatest number which leaves the same remainder when it divides…

Find the greatest number which leaves the same remainder when it divides 21, 57 and 105.

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

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #61149

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