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IMC 2023 Grade 5 — ROUND 1 Question 5

IMC · IMC 2023 Grade 5 — ROUND 1

Question 5

If $A*B$ means $\frac{A+2\times B}{2}$, then $(6*5)*7$ is
  1. 9
  2. 10
  3. 11
  4. 12