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    Question

    What value should come in the place of (?) in the

    following number series? 500, 789, 428, ?, 340, 965
    A 720 Correct Answer Incorrect Answer
    B 869 Correct Answer Incorrect Answer
    C 724 Correct Answer Incorrect Answer
    D 932 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, 500 + 17² = 500 + 289 = 789 789 – 19² = 789 – 361 = 428 428 + 21² = 428 + 441 = 869 869 – 23² = 869 – 529 = 340 340 + 25² = 340 + 625 = 965 So the pattern is: +17², –19², +21², –23², +25². Hence 869 will come in place of (?)

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