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      Question

      Select the number from the given options that can

      replace the question mark (?) in the given series. 42, 43, 39, 48, 32, 57, 21, ?
      A 50 Correct Answer Incorrect Answer
      B 70 Correct Answer Incorrect Answer
      C 35 Correct Answer Incorrect Answer
      D 44 Correct Answer Incorrect Answer

      Solution

      natural numbers starting from 1. 42 + 1┬▓ = 42 + 1 = 43 43 - 2┬▓ = 43 - 4 = 39 39 + 3┬▓ = 39 + 9 = 48 48 - 4┬▓ = 48 - 16 = 32 32 + 5┬▓ = 32 + 25 = 57 57 - 6┬▓ = 57 - 36 = 21 21 + 7┬▓ = 21 + 49 = 70 So, 70 will replace the question mark in the given series.

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