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    Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete? AEC10, FJH15, KO
    Question

    Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
    AEC10, FJH15, KOM20, PTR25, ? ​

    A.

    TSR27

    B.

    XYZ30

    C.

    UYW30

    D.

    KLJ30

    Correct option is C

    Given: AEC10, FJH15, KOM20, PTR25, ?
    Logic: Letters and number are increasing + 5 place.
    A + 5 = F, F + 5 = K, K + 5 = P, P + 5 = ​U
    E + 5 = J, J + 5 = O, O + 5 = T, T + 5 = Y
    C + 5 = H, H + 5 = M, M + 5 = R, R + 5 = W
    10 + 5 = 15, 15 + 5 = 20, 20 + 5 = 25, 25 + 5 = 30
    So, the missing term is UYW30.
    Thus, correct option is (c).

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