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      Question

      How many whole numbers from 1 to 500 (both included) are

      divisible by 3 or 5?
      A 520 Correct Answer Incorrect Answer
      B 233 Correct Answer Incorrect Answer
      C 625 Correct Answer Incorrect Answer
      D 425 Correct Answer Incorrect Answer

      Solution

      Divisible by 3: ⌊500/3⌋ = 166 Divisible by 5: ⌊500/5⌋ = 100 Divisible by 15: ⌊500/15⌋ = 33 Required = 166 + 100 − 33 = 233

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