Find the difference between C.I. and S.I. on sum of ₹4800 for 2 years at 5% per annum payable yearly.

Find the difference between the simple interest and compound interest on ₹2500 for 2 years at 4% per annum, compound interest being reckoned semi-annually.

Find the compound interest on ₹3125 for 3 years if the rates of interest for the first, second and third year are respectively 4%, 5% and 6% per annum.

What sum of money will amount to ₹9261 in 3 years at 5% per annum compound interest?