Multiple Choice Questions on The least common multiple of two natural numbers a and b is 399 What is the minimum possible sum of ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

The least common multiple of two natural numbers a and b is 399 What is the minimum possible sum of ...........

Quantitative Aptitude ( CCS) Number System
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    The least common multiple of two natural numbers a and b, is 399. What is the minimum possible sum of the digits of the number a(given a>b)?

    3

    Correct Answer

    5    

    Incorrect Answer

    7

    Incorrect Answer

    9

    Incorrect Answer
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    Explanation:

    Factorize 399=3×7×19
    The possible pairs are: (57,7),(21,19),(399,1),(133,3)

    The least possible sum is given when a=21 and b=19
    And the sum is 2+1=3

    Hence, option 1 is the correct answer.

    By: MIRZA SADDAM HUSSAIN
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