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AMO 2019 – Primary 4 (Grade 4) Question 7

AMO · AMO 2019 – Primary 4 (Grade 4)

Question 7

In the pattern $15,17,21,A,35,45,B,\ldots$, find $A+B$.

Question illustration
  1. 84
  2. 48
  3. 57
  4. 30
  5. 78