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      Question

      Suppose '68472m' is divisible by 6 but not divisible by

      5. Find the value of (m × 3 - 2).
      A 12 Correct Answer Incorrect Answer
      B 18 Correct Answer Incorrect Answer
      C 16 Correct Answer Incorrect Answer
      D 10 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Sum of digits = 6 + 8 + 4 + 7 + 2 + m = 27 + m

      We need (27 + m) divisible by 3, and m even (not 0 or 5).

      Try m = 6 → 27 + 6 = 33

      So, m = 6

      (m×3 - 2) = 18 - 2 = 16

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