Question 1
SEAMO self-study edition 2027; not an official 2027 paper. Original source years are retained. 25 questions, 90 minutes; Q1–10: 3 points, Q11–20: 4 points, Q21–25: 6 points, total 100. Original response types and all subparts are preserved. Verified is an editorial convention; source defects, necessary assumptions and unresolved mathematical uncertainty are disclosed.
In mathematics, $3^1=3$, $3^2=3\times3=9$, $3^3=3\times3\times3=27$, $3^4=3\times3\times3\times3=81$, … . What is the ones digit of $33^{33}$?
In mathematics, $3^1=3$, $3^2=3\times3=9$, $3^3=3\times3\times3=27$, $3^4=3\times3\times3\times3=81$, … . What is the ones digit of $33^{33}$?