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BBB 2022 - Secondary 3 - Preliminary Round Question 13

BBB · BBB 2022 - Secondary 3 - Preliminary Round

Question 13

Find the value of $3\times5+5\times7+\cdots+27\times29+29\times31$.
  1. 4249
  2. 4492
  3. 4924
  4. 4942