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    Question

    A series given below follows a certain pattern,

    1800, 469, (?), 855, 980, 953 If (?) = B тАУ 2, then find the nearest cube root of B.
    A 11 Correct Answer Incorrect Answer
    B 19 Correct Answer Incorrect Answer
    C 17 Correct Answer Incorrect Answer
    D 20 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, look at the cube pattern: 1800 тАУ 11┬│ = 1800 тАУ 1331 = 469 469 + 9┬│ = 469 + 729 = 1198 1198 тАУ 7┬│ = 1198 тАУ 343 = 855 855 + 5┬│ = 855 + 125 = 980 980 тАУ 3┬│ = 980 тАУ 27 = 953 So, (?) = 1198 Given (?) = B тАУ 2 B = 1198 + 2 = 1200 Now find nearest cube root of 1200: 10┬│ = 1000 11┬│ = 1331 1200 тАУ 1000 = 200 1331 тАУ 1200 = 131 Nearest cube root of 1200 is 11

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