Question

    Find the missing term (?) in the following number series.

    140     300     380      420      440      ?

    A 460 Correct Answer Incorrect Answer
    B 480 Correct Answer Incorrect Answer
    C 450 Correct Answer Incorrect Answer
    D 500 Correct Answer Incorrect Answer
    E 510 Correct Answer Incorrect Answer

    Solution

    140 + 160 = 300 300 + 80 = 380 380 + 40 = 420 420 + 20 = 440 440 + 10 =  450

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