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      Question

      Find the digit which will come at the unit place after

      solving the following expression (769 Γ— 394 Γ— 942)
      A 7 Correct Answer Incorrect Answer
      B 5 Correct Answer Incorrect Answer
      D 3 Correct Answer Incorrect Answer

      Solution

      Unit digit of 769 = 7(4 x 17 + 1) = 1 Γ— 7 = 1 Γ— 7 = 7 Unit digit of 394 = 3(4 x 23 + 2) = 1 Γ— 32 = 1 Γ— 9 = 9 Unit digit of 942 = 9(4 x 10 + 2) = 1 Γ— 92 = 1 Γ— 81 = 1 Γ— 1 = 1 Unit digit of (7 Γ— 3 Γ— 9) = 7 Γ— 9 Γ— 1 = 63 or unit digit = 3

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