Sarita buy eggs for Rs. 8.40 a dozen. At what price per hundred must she sell them so as to earn a profit of 15 % ?

A man buys a certain number of articles at 15 for Rs. 112.50 and sells them at 12 for Rs. 108. Find gain percent and the number of articles sold to make a profit of Rs. 75?

A dealer gets Rs 470 more if instead of selling a table at a loss of 10% it is sold at a gain of 10%. Find the cost price of the table?

Mr. Khanna spent 83% of his salary and saved Rs. 1870. Calculate his monthly salary?

A shopkeeper bought 300 eggs at 80 paise each. 30 eggs were broken in transit and then he sold the remaining eggs at 1 Rupee each. Find his gain or loss as percent?