Lemma
MediumDigits
AQuA-RAT train #38318 · Number Theory · Digits

What is the tens' digit T of the sum of the first…

What is the tens' digit T of the sum of the first 40 terms of 1, 11, 111, 1111, 11111, 111111, ...?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #38318

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