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    Given below are four numbers, of which three are alike in some manner and one is different. Choose the odd one.
    Question

    Given below are four numbers, of which three are alike in some manner and one is different. Choose the odd one.

    A.

    131

    B.

    123

    C.

    83

    D.

    79

    Correct option is B

    Logic: Check Prime Numbers.
    Option A: 131 → Prime 
    Option B: 123Not a prime (divisible by 3) 
    Option C: 83 → Prime 
    Option D: 79 → Prime 
    So, 123 is not a prime number (it is divisible by 3).
    Thus, the correct option is: (b).

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