Find the invalid no.from the following series 18, 24, 29, 35, 40…

Find the invalid no.from the following series 18, 24, 29, 35, 40, 42

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 #5443

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