SEAMO 2026 Paper B — Organizer self-practice SET 5 Question 24

Given $1^3+2^3=1+8=9$, $1^3+2^3+3^3=9+27=36$, and $1^3+2^3+3^3+4^3=36+64=100$, find $1^3+2^3+3^3+4^3+5^3+6^3+7^3+8^3$.