AQuA-RAT train #32373 · Number Theory · Digits
S is the infinite sequence S1 = 2, S2 = 22, S3…
S is the infinite sequence S1 = 2, S2 = 22, S3 = 222,...Sk = Sk–1 + 2(10k–1). If p is the sum of the first 30 terms of S, what is the ninth digit of p, counting right to left from the units digit?
AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #32373
Stuck? A gentle nudge
No hints for this one.
Your answer
Checked against the answer in AQuA-RAT.