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      Question

      If total number of factors of 1,080 is 'x', then find

      the value of (x - 4)(x + 3).
      A 840 Correct Answer Incorrect Answer
      B 900 Correct Answer Incorrect Answer
      C 980 Correct Answer Incorrect Answer
      D 1020 Correct Answer Incorrect Answer

      Solution

      Factors of 1,080 = 2Β³ Γ— 3Β³ Γ— 5
      So, total number of factors = (3 + 1)(3 + 1)(1 + 1) = 4 Γ— 4 Γ— 2 = 32
      Required value = (x - 4)(x + 3) = (32 - 4)(32 + 3) = 28 Γ— 35 = 980

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