šŸ“¢ Too many exams? Donā€™t know which one suits you best? Book Your Free Expert šŸ‘‰ call Now!

    Question

    Sum and difference of two natural numbers is 89 and 15.

    Find the square of sum of digits of smaller number.
    A 49 Correct Answer Incorrect Answer
    B 64 Correct Answer Incorrect Answer
    C 121 Correct Answer Incorrect Answer
    D 100 Correct Answer Incorrect Answer

    Solution

    Let the numbers be 'a' and 'b' (a > b)

    So, a + b = 89 --------- (I)

    Or, a - b = 15 ---------- (II)

    On adding equation I and II,

    We get, a + b + a - b = 89 + 15

    Or, 2a = 104

    Or, 'a' = 52

    On putting value of 'a' in equation I,

    52 + b = 89

    Or, 'b' = 37

    Required sum = (3 + 7) 2 Ā = 100

    Practice Next
    More No. System Questions
    ask-question