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    Question

    125, 142, 199, 320, 489,

    778 Find the wrong number in the given number series.
    A 142 Correct Answer Incorrect Answer
    B 125 Correct Answer Incorrect Answer
    C 320 Correct Answer Incorrect Answer
    D 489 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, The following series follows addition of square of consecutive prime numbers starting from 5: 125 + 52 = 150 150 + 72 = 199 199 + 112 = 320 320 + 132 = 489 489 + 172 = 778 So, 150 should come in place of 142.

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