New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    If Ashish has 3 types of pens in a ratio 4 : 6 : 5 such

    that their LCM is 360, then find the sum of the highest and lowest number of pens that he has?
    A 60 Correct Answer Incorrect Answer
    B 40 Correct Answer Incorrect Answer
    C 70 Correct Answer Incorrect Answer
    D 30 Correct Answer Incorrect Answer

    Solution

    Let the number of pens be 4a, 6a and 5a Then, we have LCM of (4a, 6a, 5a) = a times; LCM(4, 6, 5) = 60a rArr; 60a = 360 rArr; a = 6 rArr; No. of pens are 24, 36, 30 there4; The sum is 36 + 24 = 60

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