New 👉 Ask your RBI Grade B 2025 Preparation Queries Here!!

    Register

    Question

    Study the given pattern carefully and select the number

    that can replace the question mark (?) in it.   First row: 4, 6, 18 Second row: 7, 9, 54 Third row: 8, 5, ?   (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13-Operations on 13 such as adding /deleting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)
    A 38 Correct Answer Incorrect Answer
    B 42 Correct Answer Incorrect Answer
    C 35 Correct Answer Incorrect Answer
    D 49 Correct Answer Incorrect Answer

    Solution

    The logic followed in the given series is: (1st term x 2nd term) – 2nd term = 3rd term   First row: 4, 6, 18 (4 x 6) – 6 = 18 24 – 6 = 18 18 = 18 Second row: 7, 9, 54 (7 x 9) – 9 = 54 63 – 9 = 54 54 = 54 Third row: 8, 5, ? (8 x 5) – 5 = 35 40 – 5 = 35 35 = 35 Hence, the correct answer is (C).

    Practice Next