The selling price of 5 articles is the same as the cost price of 3 articles. The gain or loss is 

A man sold 18 cots for Rs.16800, gaining there by the cost price of 3 cots. The cost price of a cot is 

If the sales tax be reduced from $$ 3{1\over2}$$ % to $$ 3{1\over3}$$%, what difference does it make to person who purchases an article whose marked price is Rs.8400? 

If 50% of (x −y) = 30% of (x + y), then what percent of x is y? 

If 12 men and 16 boys can do a piece of work in 5 days; 13 men and 24 boys can do it in 4 days, then the ratio of the daily work done by a man to that of a boy is 

A and B can do a work in 12 days, B and C in 15 days, C and A in 20 days. If A, B and C work together, they will complete the work in 

A and B can do a work in 18 and 24 days respectively. They worked together for 8 days and then A left. The remaining work was finished by B in 

If the volumes of two cubes are in the ratio 27 : 64 and then the ratio of their total surface area is