Find the amount and the compound interest on ₹8000 for 4 years at 10% per annum, interest reckoned yearly.

If the interest is compounded half-yearly, calculate the amount when the principal is ₹7400, the rate of interest is 5% and the duration is one year.

Find the amount and the compound interest on ₹100000 compounded quarterly for 9 months at the rate of 4% p.a.

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