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    Question

    In each of these questions, a number series is given. In each series, only one number is wrong. Find out the wrong number.

    191 341 221 331 251

    281
    A 341 Correct Answer Incorrect Answer
    B 221 Correct Answer Incorrect Answer
    C 331 Correct Answer Incorrect Answer
    D 251 Correct Answer Incorrect Answer
    E 281 Correct Answer Incorrect Answer

    Solution

    191 + (15 × 10) = 341 341 – (15 × 8) = 221 221 + (15 × 6) = 311 311 – (15 × 4) = 251 251 + (15 × 2) = 281

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