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SEAMO 2026 — Paper B — SET 3 — Organizer self-practice Question 16

SEAMO · SEAMO 2026 — Paper B — SET 3 — Organizer self-practice

Question 16

Find the value of $12345654321\times(1+2+3+4+5+6+5+4+3+2+1)$.
  1. $444444^2$
  2. $555555^2$
  3. $666666^2$
  4. $777777^2$
  5. $888888^2$