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

    Question

    Sum of squares of three consecutive numbers is 770. Find

    the sum of first and third number.
    A 32 Correct Answer Incorrect Answer
    B 30 Correct Answer Incorrect Answer
    C 44 Correct Answer Incorrect Answer
    D 46 Correct Answer Incorrect Answer

    Solution

    Let the numbers be (x тАУ 1), x and (x + 1) => (x тАУ 1)2┬а+ x2┬а+ (x + 1)2┬а= 770 => x2┬атАУ 2x + 1 + x2┬а+ x2┬а+ 2x + 1 = 770 => 3x2┬а= 770 - 2 => x2┬а= 768/3 => x2┬а= 256 => x = 16 Required sum = (16 тАУ 1) + (16 + 1) = 32

    Practice Next
    More No. System Questions

    Relevant for Exams:

    ask-question