The marked price of a table is Rs. 12000. If it was sold for Rs. 10500 after allowing a certain discount, then the rate of discount is

A dozen pairs of socks quoted at Rs. 180 are available at discount of 20%. How many pairs of socks can be bought for Rs. 48

A conical flask is full of water. The flask has base radius r and height h. This water is poured into a cylindrical flask of base radius mr. The height of water in the cylindrical flask is

Product of two coprime numbers is 117. Then their LCM is

A rational number between 3/4 and 3/8 is

A does 20% less work than B. If A can complete a piece of work in 15/2 h, then B can do it in