The sum E of the arithmetic sequence a, a+d, a+2d,..., a+(n-1)d is…

The sum E of the arithmetic sequence a, a+d, a+2d,..., a+(n-1)d is give by En = (n/2)*(2a + n-1)d. What is the sum of the integers 1 to 100 inclusive, with the even integers between 25 and 63 omitted.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #86363