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BBB 2022 - Grade 3 - Preliminary Round Question 6

BBB · BBB 2022 - Grade 3 - Preliminary Round

Question 6

Define the operation symbol $a\otimes b=b\times(a+b)$, find the value of $4\oplus 7$.

Source typo note: the defined and queried symbols differ. For the intended-answer key, use the defined operation; the literal queried operation has no supplied definition.
  1. 77
  2. 44
  3. 28
  4. 11