Look at this series: 15, 15, 27, 27, 39, 39, 51, 51…

Look at this series: 15, 15, 27, 27, 39, 39, 51, 51, ... What number should fill the blank?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #10202

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