1. A shopkeeper increased the price of a cycle by 15%. The increased price was RS 1610. What is the original price ?

2. The price of 5kg of sweets was RS 180. The price has gone up such that the price of 4kg of sweets is now RS 180. What is the percentage increase in price?

3. by selling a watch for RS 1275, Javed loss 15%. At what price should he sell to make a profit of 10%

 2

Old Price:

Cost of 5kgs of sweet=Rs180

Cost of 1kg=180/5=36Rs

New Price

Cost of 4kgs of sweet=Rs180

Cost of 1kg=45Rs

% increase in price=(new price - old price/oldprice)*100

                                   =(45-36/36)*100

                                   =0.25*100 = 25%

3.

Loss=15%           SP=Rs1275  

(75/100)*CP=1275                  [100-15=75]

Cp=1275*100/75

     =Rs.1700

Now, Profit 10%:

(110/100)*1700

=1870Rs

he should see the watch at  Rs.1875 in order to get 10% profit