New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    What will come in place of the question mark (?) in the following series?

    384, 357, 313, 252, 174,

    ?
    A 65 Correct Answer Incorrect Answer
    B 79 Correct Answer Incorrect Answer
    C 29 Correct Answer Incorrect Answer
    D 69 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    384−357=27 357−313=44 313−252=61 252−174=78 We can observe that the differences between the terms are increasing by 17 each time: 27, 44, 61, 78 (each difference increases by 17). To find the next term, we need to subtract the next difference, which is 78+17 = 95. Now, subtract 95 from the last term (174):174−95=79 So, the next term in the sequence is 79.

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