Alladeen asks genie for a good sales week. He has made various shoes to be sold at the flea market. He sells some of them on the f

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Alladeen asks genie for a good sales week. He has made various shoes to be sold at the flea market. He sells some of them on the first day. Genie clicks its fingers and now the number of leftover shoe doubles. Alladeen sells the same number of shoes as on the previous day. That genie clicks the fingers again and the remainder is tripled. Alladeen again makes the same sale as earlier. On the fourth day, the same thing happens again. The number of shoes is now four times the number and the same sale happens. By the fifth day, Alladeen sells the same as on the previous days. But now the entire stock of shoes is over. Genie clicks its fingers and no new shoes appear. What is the number of shoes Alladeen had on the first day?​

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  1. Given : Alladeen asks genie for a good sales week. He has made various shoes to be sold at the flea market. He sells some of them on the first day. Genie clicks its fingers and now the number of leftover shoe doubles.

    To Find :  What is the number of shoes Alladeen had on the first day

    a) 120

    b) 111

    c) 103

    d) 123​

    Solution:

    Shoes initially  =   A

    Sold Daily = B

    Shoes at end of 1st Day = =  (A – B)

    Shoes at start of 2nd day = 2(A – B)

    Shoes at Start of 3rd  Day =  3(2(A – B)  – B)

    = 3(2A – 2B – B)

    =  6A – 9B

    Shoes at Start of 4th  Day =  4(6A – 9B – B)

    = 24A – 40B

    Shoes at Start of 5th  Day = 5(24A – 40B – B)

    = 120A – 205B

    120A – 205B = B     ( as no shoes remains after selling)

    => 120A = 206B

    => 60A  = 103B

    Initially  103     , sold every day = 60

    Initially        Sold     Left over

    103               60            43

    86                60            26

    78                 60            18

    72                 60            12

    60                60              0

    Initially has 103  

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