What is the value of X in the series

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What is the value of X in the series

10, 10, 20, X, 110, 300, 930

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    ANSWER – 45

    EXPLANATION-
    First term:        10
    second term:   10*(1/2)+5=10
    third term:        10*(1)+10=20
    fourth term:     20*(3/2)+15=45
    fifth term:          45*(2)+20=110
    sixth term:        110*(5/2)+25=300
    seventh term: 300*(3)+30=300

    Middle term increases by 0.5
    Third term increases by 5.
    The answer from of each term is used as the first term for obtaining next term.

    So the value of X is 45

    Detective Expert Answered on 31st October 2015.
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