A number if required by 25% becomes 225. By what percent should be increased so that it becomes 375?

Raju, Rinku and Ram can do a piece of work in 6, 12, and 24 days respectively. In what time will they finish the work while working together ?

D and E are midpoints of side AB and AC respectively of the ΔABC. A line drawn from A meets BC at H and DE at K. AK : KH = ?

Balls of marbles of diameter 1.4 cm are dropped into a cylindrical beaker containing some water and fully submerged. The diameter of the beaker is 7 cm. Find how many marbles have been dropped in it if the water rises by 5.6 cm?

A tradesman allows a discount of 15 % on the marked price. How much above the cost price must he mark his goods as to gain 19 %? 

A can do a piece of work in 12 days. When he had worked for 3 days. B joined him. If they complete the work in 3 more days, in how many days can B alone finish the work? 

Find the least number which when subtracted from 10.000327 is a perfect square.

A trader purchased a gift box for Rs. 150. What should be the marked price on the gift box so that after allowing a discount of 10 %, he makes a profit of 10 %?