Question

    Four numbers have been given, out of which three are

    alike in a certain way and one is different. Select the one that is different.
    A 157 Correct Answer Incorrect Answer
    B 293 Correct Answer Incorrect Answer
    C 221 Correct Answer Incorrect Answer
    D 347 Correct Answer Incorrect Answer

    Solution

    All are prime numbers except for 221 (which is divisible by 13 and 17).

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