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


    Question

    When the digits are swapped, the new two-digit number

    equals 44 less than 120% of the original. The sum of the digits is 13. Determine the original number.
    A 15 Correct Answer Incorrect Answer
    B 56 Correct Answer Incorrect Answer
    C 20 Correct Answer Incorrect Answer
    D 85 Correct Answer Incorrect Answer

    Solution

    Let tens = x, units = y. Original = 10x + y; swapped = 10y + x. 10y + x = 1.2(10x + y) тИТ 44 1.2 = 6/5 тЗТ multiply by 5: 50y + 5x = 60x + 6y тИТ 220 тЗТ 55x тИТ 44y = 220 тАж (I) x + y = 13 тАж (II) Multiply (II) by 44 and add to (I): (55x тИТ 44y) + (44x + 44y) = 220 + 572 тЗТ 99x = 792 тЗТ x = 8 y = 13 тИТ 8 = 5 Original number = 10├Ч8 + 5 = 85

    Practice Next
    More No. System Questions
    ask-question