1. Question:A man buys an article for tk 27.50 and sells it for tk 28.60. find his gain percent. 

    Answer
    4%






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  2. Question:If a ratio is purchased for tk 27.50 and sells it for tk 28.60. Find his gain percent. 

    Answer
    C.P = Tk 450
    
     S.P = Tk 465.50
    
     Loss =Tk`(490-465.50)` 
    
     = Tk 24.50
    
     :. Loss % = `((24.50)/490xx 100)` %
    
      = 5%






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  3. Question:By selling a book for tk 115.20, a man loses 10%. At what price should he sell it to gain 5%? 

    Answer
    Let the new S.P be Tk x
    
     (100-Loss%) : (1st S.P) = (100 + gain%): (2nd S.P)
    
     or, `(100-10)/115.20` = `(100+5)/x`
    
     or, x = `(105 xx 115.20/90)` = 134.40 
    
     `:.` New S.P = Tk 134.40






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  4. Question:A trader lost 20% by selling a watch for tk 1024. What percent shall he gain or loss by selling it for tk 1472? 

    Answer
    Let the new gain be  x%
    
    Then, 80 : 1024 = (100 + x) : 1472
    
    or, `80/1024` = `(100+x)/1472`
    
    or, 100 + x = `(80 xx 1472)/1024` = 115
    
    So, x = 15%






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  5. Question:Ashok purchased a radio set and sold it to Shayam at a profit of 25 % and shayam sold it to Mohan at a loss of 10 % and Mohan paid tk 675 for it. For how much did Ashok purchased it? 

    Answer
    Suppose Ashok purchased it for tk x
    
     Then, 90 % of x = 675
    
     :.`90/100 xx 125/100 xx x` = 675
    
     or, `(675 xx 100/125 xx 100/90)` = 600 tk






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