Lemma
MediumDigits
AQuA-RAT train #71334 · Number Theory · Digits

How many integers between 1 and 10^17 are such that the sum…

How many integers between 1 and 10^17 are such that the sum of their digits is 2?

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 #71334

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