At what rate percent  compound interest will Rs.625 amount to Rs. 900 in 2 years?

The S.I on a certain sum for 3 years at 14% per annum is rs. 235.20.  The sum is 

At what rate percent per annum simple interest will a sum double itself in 8 years 4 months.

Calculate the amount on Rs. 4,000 at 8% per annum for 2 years 

The difference between the simple interest for 6 years at 6% per annum and for 4 years at 4% per annum on R.S _____ is Rs. 500

The difference between simple interest and the compound  interest on Rs. 800 at 5% per annum for 1 year is.

If the discount is 10% , an items bought for Rs.9 is prices at 

Mohan borrowed Rs. 16,000 for 3 at 5% per annum compound interest.  Then the amount that Mohan will pay at the end of 3 years?

The population of a town increases 10% every 3 years.  If the present population of the town is 72,600.   Then its population after 6 years is 

If S.P of an article is 4/3 of C.P then the profit in the  transaction is