ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

    Question

    What is the unit digit of the number 'A' obtained by

    subtracting the largest two-digit prime number from the least common multiple (LCM) of all single-digit prime numbers?
    A 3 Correct Answer Incorrect Answer
    B 5 Correct Answer Incorrect Answer
    C 1 Correct Answer Incorrect Answer
    D 2 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ;

    LCM of all single-digit prime numbers = (2 ├Ч 3 ├Ч 5 ├Ч 7) = 210

    So, 'A' = 210 - 71 = 139

    Unit digit of 'A' = 9

    Practice Next
    More HCF and LCM Questions

    Relevant for Exams:

    ask-question