If 140% of a is equal to 70% of B, then  is equal to :

The difference between the simple and compound interest on a certain sum of money for 3 years at 4% per annum is Rs. 76. Find the sum ?

A shopkeeper bought pens at the rate of 9 for Rs. 16 and sold them at a profit of 50%. How many pens would a customer get for Rs. 24 ?

The compound interest on a certain sum for two successive years are Rs. 216 and Rs. 243. Find the rate of interest per annum ?

A and B can do a work in 36 days, B and C can do the same work in 45 days. A, B and C can finish it in 27 days. A and C together will do it in :

A tin vessel contains a mixture of two liquids A and B in the ratio 5 : 7. When 9 litres of mixture are drawn off and the can is filled with B, the ratio of A and B becomes 5 : 11. How many litres of liquid A was contained by the vessel initially ?

Acid and water are mixed in a vessel A in the ratio of 5 : 2 and in the vessel B in the ratio 8 : 5. In what proportion should quantities be taken out from the two vessels so as to form a mixture in which the acid and water will be in ratio of 9 : 4 ?

The average of some natural numbers is 15. If 30 is added to first number and 5 is subtracted from the last number, the average becomes 17.5 then the number of natural numbers is ?

A container is full of milk. 15 litre milk is drawn out and replaced with water and this process is repeated one time more. If in the new mixture ratio of milk and water is 16 : 9, then what was the quantity of milk initially ?