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      Question

      Find the least number which when divided by 8, 12 and 15

      leaves remainder 5 each time.
      A 175 Correct Answer Incorrect Answer
      B 145 Correct Answer Incorrect Answer
      C 125 Correct Answer Incorrect Answer
      D 165 Correct Answer Incorrect Answer

      Solution

      ATQ, Required number N satisfies: N βˆ’ 5 is divisible by 8, 12, 15 So N βˆ’ 5 = LCM(8,12,15) 8 = 2Β³, 12 = 2Β²Γ—3, 15 = 3Γ—5 LCM = 2Β³Γ—3Γ—5 = 120 So N = 120 + 5 = 125

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