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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 − 5 is divisible by 8, 12, 15 So N − 5 = LCM(8,12,15) 8 = 2³, 12 = 2²×3, 15 = 3×5 LCM = 2³×3×5 = 120 So N = 120 + 5 = 125

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