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13.	By selling a pen for Rs.15, a man loses one sixteenth of what it costs him.The cost price of the pen is
	A.  Rs.16
	B.  Rs.18
	C.  Rs.20
	D.  Rs.21

Solution

Let the C.P be Rs.x.Then, x-15=x/16 ‹=›x-x/16 = 15 15x/16=15 x = 16. Therefore, C.P= Rs.16.

14.	A shopkeeper professes to sell his goods at cost price but uses a weight of 800 gm instead of kilogram weight.Thus, he makes a profit of
	A.  20%
	B.  22%
	C.  25%
	D.  None of these

Solution

Therefore,Profit =(200/800×100)% = 25%.

15.	A fruit seller sells mangoes at the rate of Rs.9 per kg and thereby loses 20%. At what price per kg, he should have sold them to make a profit of 5%?
	A.  Rs.11.81
	B.  Rs.12
	C.  Rs.12.25
	D.  Rs.12.31

Solution

85 : 9 = 105 : x x= (9×105/80) = Rs.11.81 Hence, S.p per Kg = Rs.11.81