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SEAMO 2016 — Paper B — Grade 3–4 Question 3

SEAMO · SEAMO 2016 — Paper B — Grade 3–4

Question 3

A new operation $\star$ satisfies $3\star4=13$, $5\star9=24$, and $7\star7=28$. Find $13\star8$.
  1. $45$
  2. $46$
  3. $47$
  4. $48$
  5. None of the above