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    The LCM of two co-prime numbers is 638. If one number is 29, then the other number is:
    Question

    The LCM of two co-prime numbers is 638. If one number is 29, then the other number is:

    A.

    32

    B.

    22

    C.

    11

    D.

    13

    Correct option is B

    Given:
    LCM of two co-prime numbers = 638
    One of the numbers = 29
    Concept Used:
    For two co-prime numbers (numbers with no common factors other than 1), the LCM is simply the product of the two numbers.
    Solution:
    Let the other number be x.
    29 × x = 638
    x = 63829\frac{638}{29}​ = 22
    Thus, The other number is 22.

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