Question

    18, 25, 33, 42, 52, 63,

    ? What should come in place of the question mark (?) in the following number series?
    A 73 Correct Answer Incorrect Answer
    B 75 Correct Answer Incorrect Answer
    C 77 Correct Answer Incorrect Answer
    D 80 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    18 +7 = 25 25 + 8 = 33 33 + 9 = 42 42 + 10 = 52 52 + 11 = 63 63 + 12 = 75

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