Lemma
MediumAlgebra word problems
AQuA-RAT train #18816 · Algebra · Algebra word problems

The sum of the first k positive integers is equal to k(k+1)/2

The sum of the first k positive integers is equal to k(k+1)/2. What is the sum of the integers from y to z, inclusive, where 0<y<z?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #18816

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